Add a command palette to make features & shortcuts discoverable

[vadi2]

Try out the demo on here and right-click.

I think it's a fantastic solution for making the features of an editor discoverable plus their associated shortcuts!

[sebcaux]

It is a nice feature. Commands external to the text editor like build or run can be also added. I think it is not very hard to integrate as we ever had the commands list in TextEditorKeyMap. It is a QLineEdit with a QCompleter based on a custom model of QAbstractItemModel.

[gamecreature]

I agree. This would be a nice feature... I guess It should display the 'TextEditorCommandMap' combined with Qt's QWidget::actions()