Fix project manager display at small window sizes
Fix project manager display at small window sizes

- Don't use minimum size for project order/filter controls.
  This also allows the filter field to become longer at large
  window sizes.
- Hide the loading label instead of changing its opacity.
  This causes a reflow during loading, but this is preferable to having
  the UI overflow.
- Hide the About button on Android as it will spawn a dialog that's
  too large to be closed on most screens.
- Hide the language dropdown on Android as it doesn't work correctly.

This allows the project manager to be displayed correctly at much
lower window sizes than previously.

firefly2442/godot,akien-mga/godot,Shockblast/godot,Valentactive/godot,Valentactive/godot,Shockblast/godot,Zylann/godot,guilhermefelipecgs/godot,firefly2442/godot,pkowal1982/godot,godotengine/godot,Shockblast/godot,godotengine/godot,godotengine/godot,vkbsb/godot,godotengine/godot,firefly2442/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,Shockblast/godot,akien-mga/godot,josempans/godot,Shockblast/godot,vkbsb/godot,firefly2442/godot,sanikoyes/godot,ZuBsPaCe/godot,godotengine/godot,sanikoyes/godot,BastiaanOlij/godot,josempans/godot,ZuBsPaCe/godot,vkbsb/godot,josempans/godot,firefly2442/godot,Valentactive/godot,sanikoyes/godot,josempans/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,pkowal1982/godot,pkowal1982/godot,Zylann/godot,guilhermefelipecgs/godot,ZuBsPaCe/godot,Valentactive/godot,Zylann/godot,pkowal1982/godot,Zylann/godot,sanikoyes/godot,akien-mga/godot,vkbsb/godot,Shockblast/godot,ZuBsPaCe/godot,BastiaanOlij/godot,ZuBsPaCe/godot,BastiaanOlij/godot,godotengine/godot,pkowal1982/godot,guilhermefelipecgs/godot,akien-mga/godot,godotengine/godot,ZuBsPaCe/godot,Valentactive/godot,josempans/godot,vkbsb/godot,pkowal1982/godot,vkbsb/godot,akien-mga/godot,firefly2442/godot,sanikoyes/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,sanikoyes/godot,Shockblast/godot,akien-mga/godot,vkbsb/godot,Zylann/godot,akien-mga/godot,sanikoyes/godot,Valentactive/godot,vkbsb/godot,josempans/godot,pkowal1982/godot,BastiaanOlij/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,BastiaanOlij/godot,Shockblast/godot,josempans/godot,BastiaanOlij/godot,pkowal1982/godot,BastiaanOlij/godot,sanikoyes/godot,Valentactive/godot,Zylann/godot,Zylann/godot,godotengine/godot,Zylann/godot,firefly2442/godot,josempans/godot,firefly2442/godot,akien-mga/godot,Valentactive/godot