[ENHANCEMENT] Collapse Side Bars

[RSM9]

Please confirm these before moving forward

• I have searched for my feature proposal and have not found a work-in-progress/duplicate/resolved/discarded issue.
• This improvement refers to an existing feature. If you want to suggest a new feature, please use this template
• This improvement is not a bug. If you want to report a bug, please use this template

Describe the improvement

It would be nice for the side bars present (which show sources, filters, and search mode) to be collapsible (e.g. through an arrow-head or three dots/lines). Further, it would be better if when re-sizing the side bar, the change applies to all of WingetUI (rather than only for one section (e.g. installed packages or updates, etc.).

Describe how this improvement could help users.

Better aesthetics