GUI: Change settings-dialog title to 'Preferences'.

The menuitem is 'Preferences' so the dialog must have the same title.

gui/cppcheck_de.ts

@@ -513,7 +513,7 @@ To toggle what kind of errors are shown, open view menu.</source>
     <name>Settings</name>
     <message>
         <location filename="settings.ui" line="14"/>
-        <source>Settings</source>
+        <source>Preferences</source>
         <translation type="unfinished"></translation>
     </message>
     <message>

gui/cppcheck_en.ts

@@ -335,10 +335,6 @@ Stop the checking before exiting.</translation>
         <source>XML files (*.xml);;Text files (*.txt);;CSV files (*.csv)</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>XML files (*.xml);;Text files (*.txt)</source>
-        <translation type="obsolete">XML files (*.xml);;Text files (*.txt)</translation>
-    </message>
     <message>
         <location filename="mainwindow.cpp" line="517"/>
         <source>Save the report file</source>
@@ -485,19 +481,11 @@ Please check the application path and parameters are correct.</translation>
         <source>possible error</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>all</source>
-        <translation type="obsolete">All</translation>
-    </message>
     <message>
         <location filename="resultstree.cpp" line="615"/>
         <source>style</source>
         <translation>Style</translation>
     </message>
-    <message>
-        <source>security</source>
-        <translation type="obsolete">Security</translation>
-    </message>
     <message>
         <location filename="resultstree.cpp" line="619"/>
         <source>error</source>
@@ -545,8 +533,8 @@ To toggle what kind of errors are shown, open view menu.</translation>
     <name>Settings</name>
     <message>
         <location filename="settings.ui" line="14"/>
-        <source>Settings</source>
-        <translation>Settings</translation>
+        <source>Preferences</source>
+        <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="settings.ui" line="24"/>

gui/cppcheck_fi.ts

@@ -337,10 +337,6 @@ Lopeta tarkistus ennen ohjelman sammuttamista.</translation>
         <source>XML files (*.xml);;Text files (*.txt);;CSV files (*.csv)</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>XML files (*.xml);;Text files (*.txt)</source>
-        <translation type="obsolete">XML-tiedostot (*.xml);;Tekstitiedostot (*.txt)</translation>
-    </message>
     <message>
         <location filename="mainwindow.cpp" line="517"/>
         <source>Save the report file</source>
@@ -489,19 +485,11 @@ Tarkista että ohjelman polku ja parametrit ovat oikeat.</translation>
         <source>possible error</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>all</source>
-        <translation type="obsolete">Epävarmat</translation>
-    </message>
     <message>
         <location filename="resultstree.cpp" line="615"/>
         <source>style</source>
         <translation>Tyyli</translation>
     </message>
-    <message>
-        <source>security</source>
-        <translation type="obsolete">Tietoturva</translation>
-    </message>
     <message>
         <location filename="resultstree.cpp" line="619"/>
         <source>error</source>
@@ -549,8 +537,8 @@ Määrittääksesi minkä tyyppisiä virheitä näytetään, avaa näkymä valik
     <name>Settings</name>
     <message>
         <location filename="settings.ui" line="14"/>
-        <source>Settings</source>
-        <translation>Asetukset</translation>
+        <source>Preferences</source>
+        <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="settings.ui" line="24"/>

gui/cppcheck_ru.ts

@@ -521,8 +521,8 @@ To toggle what kind of errors are shown, open view menu.</source>
     <name>Settings</name>
     <message>
         <location filename="settings.ui" line="14"/>
-        <source>Settings</source>
-        <translation>Параметры</translation>
+        <source>Preferences</source>
+        <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="settings.ui" line="24"/>

gui/cppcheck_se.ts

@@ -482,19 +482,11 @@ Kontrollera att sökvägen och parametrarna är korrekta.</translation>
         <source>possible error</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>all</source>
-        <translation type="obsolete">allt</translation>
-    </message>
     <message>
         <location filename="resultstree.cpp" line="615"/>
         <source>style</source>
         <translation>stil</translation>
     </message>
-    <message>
-        <source>security</source>
-        <translation type="obsolete">säkerhet</translation>
-    </message>
     <message>
         <location filename="resultstree.cpp" line="619"/>
         <source>error</source>
@@ -542,8 +534,8 @@ För att ställa in vilka fel som skall visas använd visa menyn.</translation>
     <name>Settings</name>
     <message>
         <location filename="settings.ui" line="14"/>
-        <source>Settings</source>
-        <translation>Inställningar</translation>
+        <source>Preferences</source>
+        <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="settings.ui" line="24"/>

gui/settings.ui

@@ -11,7 +11,7 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Settings</string>
+   <string>Preferences</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>