Consistently provide a generic context menu to host advanced editing actions where applicable #5528

Problem you would like to solve

We see other tools (excalidraw, Miro, Google Sheets) use a context menu to give users a chance to uncover editor actions / customize the editor. Using the modeler I stumble upon a barebones context menu (canvas) and no context menu in other places (i.e. in the properties panel):

Proposed solution

• Modeler offers standard context menu (Copy/Cut/Paste) for any text element
• Modeler offers advanced context menu inside of the canvas, featuring more general actions
  • Copy/Paste/Duplicate if applicable
  • Select all
  • General configuration tools on empty canvas:
    • Toggle grid
    • Toggle properties panel

Alternatives considered

We could instead use a command palette (#3491). However this is not a real alternative. A meaningful and working context menu is a core application too.

Additional context

No response