<QApplication>
add widgets module
QUrl -> QUrlQuery
No scene in constructor
QJson now internal?
Switch from using qjson to using QJsonDocument.
Remove -lqjson
Use toggleViewAction() to show and hide dockers.
Tweak tab height hack (It's still a dirty hack).
Move icon setting to .ui file now that designer is working.
Tweak sizes. Make Help dialogs wider to make sure all text fits.
Add titles to help dialogs.
Seems qt is now finding some icons from somewhere even if the theme is "".
Update INSTALL to explain qt4 and qt5 branches.