Improve performance of Icon rendering in `CompactLaucherOverlay`

[whiskeyPeak]

Is there an existing issue for this?

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Current behavior

Scrolling through the listview leads to icons taking some time before actually getting rendered. I haven't looked closely at the source code but I'm sure there must be a way to improve things here. Maybe caching the path the icon is located at? Will take a deeper look.

Expected behavior

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Steps to reproduce

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Environment (values that do not apply assign with "N/A")

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Anything else?

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Code of Conduct

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