Vertex editor polishing and improvements #6051

Job	Run time
build (arm64-android, android_arm64_v8a, OFF)	10m 25s
build (arm64-android, android_arm64_v8a, ON)	13m 48s
build (arm-neon-android, android_armv7, OFF)	19m 51s
build (arm-neon-android, android_armv7, ON)	12m 52s
build (x64-android, android_x86_64, OFF)	14m 1s
build (x64-android, android_x86_64, ON)	13m 23s
build (x86-android, android_x86, OFF)	9m 44s
build (x86-android, android_x86, ON)	8m 38s
comment (pr)	6s
comment (commit)	0s
deploy to play store	0s
	1h 42m 48s

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