0317cf2663
* Graphs are working again * Multiple instances not working * MainWindow was creating a new core, as well as OptionDialog
- no static WebServerThreads anymore. fixes a crash on load/new - manage own QRCore - don't quit the Application but close the window in actionNew - use startDetached in actionLoad, so the new instance won't get killed
Without titlebar buttons, e. g. in i3, there was no easy way to quit.
First commit with the app code