GUI: Add icons for warning/performance categories and add them to toolbar.

gui/gui.qrc

@@ -15,7 +15,9 @@
     <file>images/showerrors.png</file>
     <file>images/showstylewarnings.png</file>
     <file>images/openproject.png</file>
-
+    <file>images/showwarnings.png</file>
+    <file>images/showperformance.png</file>
+    <file>images/utilities-system-monitor.png</file>
     <file alias="COPYING">../COPYING</file>
     <file alias="AUTHORS">../AUTHORS</file>
     <file>images/go-home.png</file>

gui/main.ui

@@ -177,7 +177,9 @@
     <bool>false</bool>
    </attribute>
    <addaction name="mActionShowErrors"/>
+   <addaction name="mActionShowWarnings"/>
    <addaction name="mActionShowStyle"/>
+   <addaction name="mActionShowPerformance"/>
   </widget>
   <action name="mActionLicense">
    <property name="text">
@@ -427,6 +429,10 @@
    <property name="checkable">
     <bool>true</bool>
    </property>
+   <property name="icon">
+    <iconset resource="gui.qrc">
+     <normaloff>:/images/showwarnings.png</normaloff>:/images/showwarnings.png</iconset>
+   </property>
    <property name="text">
     <string>Warnings</string>
    </property>
@@ -441,6 +447,10 @@
    <property name="checkable">
     <bool>true</bool>
    </property>
+   <property name="icon">
+    <iconset resource="gui.qrc">
+     <normaloff>:/images/showperformance.png</normaloff>:/images/showperformance.png</iconset>
+   </property>
    <property name="text">
     <string>Performance warnings</string>
    </property>

gui/resultstree.cpp

@@ -626,12 +626,14 @@ void ResultsTree::CopyPath(QStandardItem *target, bool fullPath)
 
 QString ResultsTree::SeverityToIcon(const QString &severity) const
 {
-    if (severity == "possible error")
-        return ":images/dialog-warning.png";
     if (severity == "error")
         return ":images/dialog-error.png";
-    if (severity == "style" || severity == "possible style")
+    if (severity == "style")
         return ":images/dialog-information.png";
+    if (severity == "warning")
+        return ":images/dialog-warning.png";
+    if (severity == "performance")
+        return ":images/utilities-system-monitor.png";
 
     return "";
 }