[FEATURE REQUEST] problem with search bar and size of rescan button

### Please confirm these before moving forward.

- [x] I have searched for my feature proposal and have not found a work-in-progress/duplicate/resolved/discarded issue.
- [x] This proposal is a completely new feature. If you want to suggest an improvement or an enhancement, please use [this template](https://github.com/Devolutions/UniGetUI/issues/new?labels=enhancement&projects=&template=enhancement-improvement.yml&title=%5BENHANCEMENT%5D+%28Enter+your+description+here%29).

### Describe the new feature

i know that the search bar under "updates" is only for software-updates but usually there are never more updates in a week than 5, and searching them isn't necessary either. maybe the search bar should redirect to the search results of packages or not be there at all.

another problem is the small size of the refresh/rescan button. sometimes i want to be sure that there is no update left and i have to aim for the rescan-button just like in cs 1.6.

### Describe how this new feature could help users

faster searching for available packages to install and better accessibility to check for accessable updates.