UI: Add View pie to File Browser

Adds a pie menu to the File Browser for convenient switching between vertical list, horizontal list and thumbnail view.

Uses the same shortcut as other View pie menus (`ACCENT_GRAVE`).

{F12811673}

Reviewed By: #user_interface, pablovazquez, Severin

Differential Revision: https://developer.blender.org/D13874

release/scripts/presets/keyconfig/keymap_data/blender_default.py

@@ -2234,6 +2234,7 @@ def km_file_browser(params):
          {"properties": [("increment", -10)]}),
         ("file.filenum", {"type": 'NUMPAD_MINUS', "value": 'PRESS', "ctrl": True, "repeat": True},
          {"properties": [("increment", -100)]}),
+        op_menu_pie("FILEBROWSER_MT_view_pie", {"type": 'ACCENT_GRAVE', "value": 'PRESS'}),
 
         # Select file under cursor before spawning the context menu.
         ("file.select", {"type": 'RIGHTMOUSE', "value": 'PRESS'},