Add selectable message box helper, use it, make login GUI error label selectable
Don't make LabeledToolButton selectable
Move "Forget" button to a sane place
Make ConsoleWindow have Qt::Window flag (adds minimise/maximise buttons to titlebar)
Customizable folder browsing is same as for the instance folder. Syste Proxy usage.
Merge branch 'develop' of github.com:MultiMC/MultiMC5 into develop
Hack for Intel graphics drivers on Windows.
List available proxies on start
Revamp Linux build instructions for Qt Creator