Limit custom icons size in various editor widgets #391

Job	Run time
📊 Static checks / Code style, file formatting, and docs	3m 12s
🍏 iOS / Template (target=template_release)	2m 6s
🐧 Linux / Editor w/ Mono (target=editor)	25m 6s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	42m 18s
🤖 Android / Template (target=template_release)	5m 30s
🏁 Windows / Editor (target=editor, tests=yes)	34m 53s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	19m 22s
🏁 Windows / Template (target=template_release)	11m 34s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	19m 6s
🍎 macOS / Editor (target=editor, tests=yes)	28m 55s
🍎 macOS / Template (target=template_release)	20m 12s
🐧 Linux / Template w/ Mono (target=template_release)	2m 14s
🌐 Web / Template (target=template_release)	1m 54s
🐧 Linux / Minimal template (target=template_release, everything disabled)	2m 12s
🪲 Godot CPP / Build and test Godot CPP	14m 14s
	3h 52m 48s

Provide feedback