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.

tests/TestPasswordGenerator.h

@@ -30,4 +30,4 @@ private slots:
     void testLookalikeExclusion();
 };
 
-#endif //KEEPASSXC_TESTPASSWORDGENERATOR_H
+#endif // KEEPASSXC_TESTPASSWORDGENERATOR_H