Fixes for 0.8.0

• Fixed: on 26.3, opening a page after a Dialog Engine drawn dialog (or any Studio-drawn dialog) could make the game throw away the server's resource packs. MC GUI ships its whole HUD shader again, as 0.7.2 did.
• Fixed: the hotbar could show over a fullscreen page on 26.3, and with Fabulously Optimized the pause menu's middle buttons faded into the page.
• Fixed: a text shader from another plugin that is written for older versions only (ItemsAdder lists one for 26.3 too) is no longer merged for 26.3, where it doesn't compile. The console says which versions were skipped.
• Fixed: a merged BetterHud shader on 1.21.11 needed a file only BetterHud's own pack carries. MC GUI's pack now carries it too.
• Fixed: protected packs (ItemsAdder's) are now read in full when MC GUI checks whether they cover its shaders.
• Fixed: on Canvas (and other Folia forks), a player joining or opening a page right after being moved could throw "Cannot teleport async when another region handoff is present". MC GUI now moves a player once at a time.