Don't expose optional saveSilently argument for scripting app.fileSaveAs(filename) due to possible security issue

git-svn-id: http://svn.code.sf.net/p/texstudio/code@4167 92cce386-e96d-4106-809f-596c673a3fd8
option for inverted colors in PDF viewer (user request)

git-svn-id: http://svn.code.sf.net/p/texstudio/code@4168 92cce386-e96d-4106-809f-596c673a3fd8
unified indentation (space -> tabs), fix compiler warnings

git-svn-id: http://svn.code.sf.net/p/texstudio/code@4169 92cce386-e96d-4106-809f-596c673a3fd8
organize qmake code for submodules in separate .pri files

git-svn-id: http://svn.code.sf.net/p/texstudio/code@4170 92cce386-e96d-4106-809f-596c673a3fd8
don't allow the horizontal splitter to collapse its children.

git-svn-id: http://svn.code.sf.net/p/texstudio/code@4171 92cce386-e96d-4106-809f-596c673a3fd8