Add cut/copy/paste to Cinnamon menu editor, buttons, as well as context
menu items.

- Allow pasting into left-hand category list
- Allow editing properties of left-hand categories
- Cut/Copy app entries, paste into new category
- Move up/down support in either pane of categories.
Add symbolic link for missing cinnamon-applications-merged folder in
the /etc/xdg/menus folder, as well as creating one if necessary
in the user .config/menus folder at runtime.
Fix a couple errors, remove Wine from the standard category list
(it gets added automatically from the merge directories
Re-add Wine category
Change 'name' of Wine category to match what wine actually calls it -
this prevents duplication of the wine category.
Some fixes, paste wasn't working right
Merge pull request #1764 from mtwebster/menu-editor-cut-paste

Add cut/copy/paste to Cinnamon menu editor fix merged menu integration