Fix the linux keymap (#9829)

Earlier versions where a simple find-replace of `cmd` => `ctrl`. In this
PR, I've gone over every keybinding individually and checked them.

Release Notes:

- Removed the `ShowContextMenu` action, it's only usage was in the
collab panel and it's been rebound to `SecondaryConfirm`

crates/collab_ui/src/collab_panel.rs

@@ -1802,7 +1802,7 @@ impl CollabPanel {
         }
     }
 
-    fn show_inline_context_menu(&mut self, _: &menu::ShowContextMenu, cx: &mut ViewContext<Self>) {
+    fn show_inline_context_menu(&mut self, _: &menu::SecondaryConfirm, cx: &mut ViewContext<Self>) {
         let Some(bounds) = self
             .selection
             .and_then(|ix| self.list_state.bounds_for_item(ix))