[ui enhancement] change text fields to match M3 look

[diegoberaldin]

Originally requested by @SagXD on Matrix.

Change search bar on explore tab and side bar to Material 3 look

[diegoberaldin]

Actually it is unclear what they are asking here, because the app is already using M3 components and the text fields - ugly as they may look - are actually matching M3 specs:

https://m3.material.io/components/text-fields/specs

[SagXD]

ugly as they may look

Exactly they look ugly. That's why I suggested it. I think It should look like Thunder search bar or Moshidon search bar.