Provide icon for monotonic cubic interpolation #2439

Job	Run time
📊 Static checks / Code style, file formatting, and docs	54s
🍎 macOS / Editor (target=editor)	8m 40s
🍎 macOS / Template (target=template_release)	4m 26s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	3m 24s
🐧 Linux / Template w/ Mono, debug (target=template_debug)	3m 5s
🌐 Web / Template w/o threads (target=template_release, threads=no)	4m 1s
🐧 Linux / Minimal template (target=template_release, everything disabled)	1m 57s
🏁 Windows / Template (target=template_release)	2m 45s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	3m 44s
🐧 Linux / Template w/ Mono, release (target=template_release)	2m 11s
🐧 Linux / Editor with ThreadSanitizer (target=editor, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	7m 42s
🏁 Windows / Editor (target=editor)	6m 57s
🍏 iOS / Template (target=template_release)	2m 17s
🐧 Linux / Editor w/ Mono (target=editor)	9m 37s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	3m 26s
🏁 Windows / Template w/ GCC (target=template_release, use_mingw=yes)	2m 52s
	1h 7m 58s

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