Fix FPS limit not applying while the window is minimized

[QueryOfficial]

Summary

End the frame for the FPS limiter in CCore::HandleIdlePulse while the window is minimized, so the wait in OnGameTimerUpdate keeps running.

Motivation

Fixes #5487

MTA patches out GTA's foreground check (0x748A8D), so the game keeps ticking while minimized. RenderWare's camera begin update fails on IsIconic though, so nothing gets rendered and Present is never called. Alt-tab minimizes the window in both fullscreen modes.

Since #5169 the limiter only ran from Present, and since #5417 OnGameTimerUpdate only waits after a Present ended the frame. Minimized, that never happens, so the game runs uncapped (300-400 FPS in the issue), which also breaks onClientRender FPS counters and speeds up game logic. Before #5169 the limiter ran from DoPulsePostFrame, which HandleIdlePulse already calls while minimized, so this puts that back.

Also dropped "minimized" from the OnFrameEnd comment, the game timer does tick there.

Test plan

1. Join a server with setFPSLimit(60) or vsync on, run showframegraph.
2. Alt-tab out in borderless or fullscreen so the window minimizes, wait a few seconds, come back.
3. The frame graph should show the limiter wait (LimiterStart/LimiterEnd) during the minimized part as well, and an onClientRender FPS counter should stay at the cap.
4. Check normal play, loading and connecting from the main menu still hold the cap.

Checklist

• Your code should follow the coding guidelines.
• Smaller pull requests are easier to review. If your pull request is beefy, your pull request should be reviewable commit-by-commit.

[ArranTuna]

Tested and works.