When adding a new include path check if the path is relative path to
the project file's path. If path is relative then remove the begin of
the path making it a relative path in project file.
Ticket: #3019 (GUI: Add project include paths as relative paths)
Since include dir order is important (Cppcheck uses the first file
it finds) user must be able to edit the order of include paths.
This commit adds "Up" and "Down" buttons to the Project-dialog's
inlude paths-tab. User can use those two buttons to re-order the
include directories.
Ticket: #3037 (GUI: Allow reordering include paths in project dialog)
Use project file's location as base path when adding new paths
(checked, included or ignored) to the project. In most cases user
wants to add paths in the same project so this reduces browsing
paths considerably when adding them.
Show native path separators in project file-dialog. Convert paths
to internal separators when reading from project file and when
reading from the dialog. Convert to native separators when adding
to the dialog (for the user).
Add similar GUI than include paths has. Currently there is only
possibly select directories directly from the GUI. But filename
can be added to the path by editing it.
Handling paths in line edit control is quite hard. List control is
much more pleasant to use for it. Convert Project file path
handling to similar list control usage than include paths earlier.
Editing include directories in edit control is not nice. Instead
add new tab and list control for the include directories. They
are now added, edited and removed like global include directories
in settings dialog.
This commit separates logic more from the GUI. The dialog class is
only responsible from showing the dialog and handling data in it.
Other related classes do the project file reading/saving/etc.
Add new "New project file" item to File-menu and rename existing
"Project File" item to "Open Project File". Selecting new file
opens empty project file dialog. When the dialog is then closed
the user is asked to select a filename for the new project file.
