Tuning switching tabs interactions

[FedeLoch]

Tuning Alt tab + alt shift tab feature

Following #19776, in this pr, with @tesonep, we improved the UX by extending the feature allowing left and right arrows and...

We fixed the GC problem by caching the thumbs and only drawing them once per feature opening.

We profiled it by doing:

tabs := 30 timesCollect: [ :i | ClyFullBrowserMorph openOnClass: Object ].
AndreasSystemProfiler spyOn: [
		time := [
			        TaskListMorph allInstances first
				        openInWorld;
				        selectNextTask;
				        selectNextTask;
				        selectNextTask ] timeToRun ].
tabs do: #close.
time

Before GC behavior

After GC behavior

[request-info]

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[jecisc]

The CI does not work :(

[jecisc]

Not sure this should be commited here