Replace Button for vertexGroup UI

It would be a very low hanging fruit when there would be a "replace" button or an alt+click assign functionality for the existing "assign" button to replace the current contents of a vertexGroup by currently selected. Otherwise it is a bit of wrangling needed and quite annoying (for me) to have to do that when it could be so much more comfortable. The ALT-press functionality should be extended to the select button as well. I apologize if there is already something like that, but the VertexGroup's UI Documentation doesn't feature anything like that.