Make file actions the same in all views

Currently when you are in the list and act on a file through multiselect, there are more actions than when you for example view that image and use the 3-dot-menu from the detail view.

- This list should clearly be the same.
- Also we should decide if there’s anything we don’t really need or should consolidate.
- We need to think about the sorting, for example »Delete« (should be called that, not »Remove«) should always be at the bottom
- We should think about introducing icons for the important actions (not for all) so they are even easier to find.

cc @mario @eppfel @AndyScherzinger @tobiasKaminsky