Gui: Adding Pause button working, full screen button and labels to buttons on main window gui (#2634)

* Adding names to gui buttoms and adjusting spacing.

* moving refresh button to last slot.

* Changing the implementation to tooltips for hover over them - qstring to detect background color.

* Fixing some themes with inverted tooltip base

* Suggestions / Fixes - Pause and FullScreen Buttons

* Update REUSE.toml

* cleaning up

* Icons stuff

* clang

* Buttons toggle - Cleaning code - Fixing Icons

* cleaning boolean

* Toggle pause and play icons and label to "Resume" when paused.

* Simplifying the toggles.

* New icons and final Push to review

* Reuse

* Icon rename, adding f9 press for pause game when no gui is on without needed of debug menu

* clang + reuse

* clang dosent work on this part

* again Clang

* Last fix for review. Light theme white resume icon fix.

* Proper fix for Resume icon

* New Rebase

* Fixed Orientation with docking issues and cleaning boxlayout code

* Adding spacer to separate actions, sizeslider on top of search bar. And adding margins

* Fixed Background not showing on OLED Theme

* Fixing check marks

* Adding all Daniel Suggestions and fixed F9 not working with debug menu open.

* Clang

* reverting all OLED theme changes

* Final suggestions

src/sdl_window.h

@@ -7,6 +7,8 @@
 #include "core/libraries/pad/pad.h"
 #include "input/controller.h"
 #include "string"
+#define SDL_EVENT_TOGGLE_FULLSCREEN (SDL_EVENT_USER + 1)
+#define SDL_EVENT_TOGGLE_PAUSE (SDL_EVENT_USER + 2)
 
 struct SDL_Window;
 struct SDL_Gamepad;