fix(splitter): add touch-action: none style to splitbar #5127

Job	Run time
CI \| Unit	1s
CI \| Visual	1s
Status check > Unit	1s
Compile themes / run	52s
Lint scripts / run	47s
Render test pages / verify	10s
Lint styles / run (default)	1m 22s
Lint styles / run (bootstrap)	1m 27s
Lint styles / run (material)	1m 34s
Lint styles / run (classic)	1m 37s
Lint styles / run (fluent)	1m 11s
Render test pages / run	2m 52s
Status check > Lint scripts	1s
Status check > Lint styles	1s
Status check > A11y / prepare	1s
Create screenshots / run (default)	2m 7s
Create screenshots / run (bootstrap)	2m 19s
Create screenshots / run (material)	2m 27s
Create screenshots / run (classic)	2m 4s
Create screenshots / run (fluent)	2m 37s
Status check > A11y / run-checks (1)	2m 28s
Status check > A11y / run-checks (2)	2m 51s
Status check > A11y / run-checks (3)	2m 34s
Status check > A11y / run-checks (4)	2m 34s
Detect changes	20s
Status check > Visual	1s
	34m 20s

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