Merge branch 'left-panel/stashes' into left-panel/-main

Conflicts:
	GitUI/UserControls/RepoObjectsTree.Stashes.cs
	GitUI/UserControls/RepoObjectsTree.cs
	GitUI/UserControls/RepoObjectsTreeSet.cs
Merge branch 'left-panel/-main' of https://github.com/bergerjac/gitextensions into left-panel/-main