Fixes: #8050

For some reason that we didn't investigate, if you have view caching
enabled,
and you have non-integer sized bounds, and you are right aligning
things, the
co-ordinates can differ by +/- 1px when using the cached view.

The easiest fix for now is to just not do that.

Co-Authored-By: Antonio <as-cii@zed.dev>

Release Notes:

- Fixed the pane icons flickering
([#8050](https://github.com/zed-industries/zed/issues/8050)).

Co-authored-by: Antonio <as-cii@zed.dev>