Restore correct formatting

Many lines were not conformant with the project's formatting rules.
This patch should fix all formatting and whitespace issues in the code
base.
A clang-format directive was put around the connect() calls containing
SIGNALs and SLOTs whose signatures would be denormalized because of the
formatting rules.

src/gui/ApplicationSettingsWidget.h

@@ -25,7 +25,7 @@ namespace Ui
 {
     class ApplicationSettingsWidgetGeneral;
     class ApplicationSettingsWidgetSecurity;
-}
+} // namespace Ui
 
 class ISettingsPage
 {