Context toolbar - corner editor

[Ingolf]

This should be a setting in the context toolbar

[VectorStyler]

@Ingolf Added to the backlog.

[Boldline]

I don't understand why this would need to be in the context toolbar. Settings in the context tool bar should be things that someone might swap between frequently during their workflow. The option for single corner adjustment is a preference someone might make and then be done with it. It's not a setting that would need frequent attention or switching. Why would they need easy access to switch to the other method? All this does is clutter up the UI and take away real estate for other more applicable settings