Fix compile issue with plugins on msvc.
Fix msvc compile issue in tabwidget.
Fix msvc compile issue in mainapplication use of undefined type
RegisterQAppAssociation
Fix msvc compile issue with datapaths
Fix msvc compile error m_usingTransparentBackground undeclared
identifier
Fix msvc compile issue m_navigationBar undeclared identifier
Merge pull request #1264 from K0r5hun/master

Fix some issues for msvc compile