Fix some VisualShader features for high DPI displays/custom UI scales #34067

Job	Run time
📊 Static checks / Code style, file formatting, and docs	25s
🍏 iOS / Template (target=template_release)	1m 50s
🤖 Android / Editor (target=editor)	5m 10s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	3m 52s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	3m 52s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	4m 30s
🍎 macOS / Editor (target=editor, tests=yes)	5m 4s
🌐 Web / Template w/o threads (target=template_release, threads=no)	4m 35s
🐧 Linux / Editor w/ Mono (target=editor)	7m 23s
🍎 macOS / Template (target=template_release)	3m 10s
🏁 Windows / Editor (target=editor, tests=yes)	11m 45s
🐧 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)	18m 39s
🏁 Windows / Template (target=template_release)	9m 40s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	9m 9s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	7m 57s
🐧 Linux / Template w/ Mono (target=template_release)	2m 2s
🐧 Linux / Minimal template (target=template_release, everything disabled)	2m 25s
🪲 Godot CPP / Build and test Godot CPP	7m 44s
	1h 49m 12s

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