Game lags behind when minimized on wayland

The game slows down too much on **wayland** when minimized. When window is maximized the game needs to catch up again.
The reason for that is wayland lags out on `SDL_GL_SwapWindow(sdlWindow);` when the game is minimized. In one way that's great - the frames are not rendered when not used and the cpu usage is very low. Unfortunately in current state it is not in control and lags behind the current game events.
Native wayland does not send any window events like SDL_WINDOWEVENT_SHOWN or SDL_WINDOWEVENT_MINIMIZED so we can't rely on variable `globalRendering->active` ( see SpringApp.cpp).
Short read on the issue:
https://emersion.fr/blog/2018/wayland-rendering-loop/

The issue occurs only with **VSync on** (or adaptive). Otherwise the engine calls `SDL_GL_SetSwapInterval(0)` and forces swap to always return immedaitely.
Engine can be run on x11 (default on flatpak) as long as the desktop is on wayland.

Start in SpringApp.cpp and inspect SDL_GL_SwapWindow(sdlWindow), globalRendering->active, and the VSync or adaptive swap-interval path. Reproduce the issue on Wayland with the game minimized, then restore the window and observe whether game events catch up. Done means minimized rendering remains efficient without the game falling behind when restored.

Written by the indexing model from the issue text.