[desktop] Add icon-only mode to grid and improve design (#3485)

- Move Game Icon Size to the main toolbar. It's cleaner that way
- Add a "Show Game Name" toggle that does as it says. Disabling it
  basically creates an "icons-only" mode. Useful for controller-only
  nav with big icons (TODO: maybe make a 192 size?)
- Fixed a crash with controller nav. Oops
- Rounded corners of the game icon in grid mode
- Fixed the scroll bar creating extra clamping range on the grid icons
- Item can be deselected if user clicks on the blank space outside of the view

As a bonus fixed a crash on mod manager

Future TODOs for design:
- [ ] Row 1 type. Not sure what to do here tbh.
- [ ] Move around game list settings in configure_ui to make it clear
  that nothing there affects the grid view.
- [ ] 192x192 size? 256 feels too big on my 1440p screen whereas 128
  feels too small.
- Set text space as a function of fontMetrics.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3485
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: Maufeat <sahyno1996@gmail.com>

src/yuzu/main.ui

@@ -112,6 +112,11 @@
      <addaction name="action_Tree_View"/>
      <addaction name="action_Grid_View"/>
     </widget>
+    <widget class="QMenu" name="menuGame_Icon_Size">
+     <property name="title">
+      <string>Game &amp;Icon Size</string>
+     </property>
+    </widget>
     <action name="action_Reset_Window_Size_720">
      <property name="text">
       <string>Reset Window Size to &amp;720p</string>
@@ -145,6 +150,8 @@
     <addaction name="menu_Reset_Window_Size"/>
     <addaction name="menu_View_Debugging"/>
     <addaction name="menu_Game_List_Mode"/>
+    <addaction name="menuGame_Icon_Size"/>
+    <addaction name="action_Show_Game_Name"/>
    </widget>
    <widget class="QMenu" name="menu_Multiplayer">
     <property name="enabled">
@@ -586,6 +593,24 @@
     <string>&amp;Grid View</string>
    </property>
   </action>
+  <action name="actionGame_Icon_Size">
+   <property name="text">
+    <string>Game Icon Size</string>
+   </property>
+  </action>
+  <action name="actionNone">
+   <property name="text">
+    <string>None</string>
+   </property>
+  </action>
+  <action name="action_Show_Game_Name">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Show Game &amp;Name</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="yuzu.qrc"/>