[REQUEST] Allow mulit file select from tree veiw

[ashthespy]

Support for multi file select in tree view

Steps to reproduce:

1. Select two+ files from tree view
2. Right click, no Git submenu
3. --

Any chance this can be added? This would mean a new menu entry for tree-view.multi-select, .tree-view .multi-select and the appropriate end points to handle multiple files.