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.
Kimmo Varis
Reijo Tomperi