fix: Search popup sometimes not focusing

[Ascyt]

Fixed #1810. It seems to focus mostly consistently for me now. I've still had a handful of cases where it still didn't focus, however it seems to work much better than the current version.

Changes in this PR:

• Try to focus the element 10 times in the first second
• Sidebery's default search bar now only shows when in focus of sidebery. Previously, it would show it even when sidebery was not in focus. I believe this primarily led to the issue, as I suppose the search window of sidebery also tried to get focus, which conflicted.
• Removed the 300ms delay for search. Not sure why this is a thing in the first place, it works perfectly fine without the delay and is much more snappier and usable, especially when using this feature a lot and frequently switching between tabs.