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/core/PasswordGenerator.cpp

@@ -124,7 +124,6 @@ bool PasswordGenerator::isValid() const
     }
 
     return !passwordGroups().isEmpty();
-
 }
 
 QVector<PasswordGroup> PasswordGenerator::passwordGroups() const