Settings-dialog is more natural place for language selection than
the main menu. We also have more space and freedom there to have
longer text etc to make the selection easier (menus are quite limited
controls).
I accidentally added the 'placeholderText' attribute to settings.ui
when editing it with Qt Creator. That attribute was added in Qt
4.7.0 and we are not using it for anything. So removing it to fix
building with older Qt versions.
This commit adds new setting and GUI for global include dirs. When
project file with include dirs is loaded, global includes dirs are
added first and after them the include dirs from project file.
Kimmo Varis
Vesa Pikki