feat: remember last selected environment

[therealrinku]

Description

Remember and load last selected environment on opening the collection. Addressing #1598 #1652

Contribution Checklist:

• [x] The pull request only addresses one issue or adds one feature.
• [x] The pull request does not introduce any breaking changes
• [x] I have added screenshots or gifs to help explain the change if applicable.
• [x] I have read the contribution guidelines.
• [x] Create an issue and link to the pull request.

https://github.com/usebruno/bruno/assets/76877078/91f312c8-1df1-4a21-84db-caa15827a1a4

[Stokkie64]

Nice, Hope this gets merged, has been bothering me. Thanks!

[end3rbyte]

I also can't wait to have this change merged, thank you @therealrinku

[Brawl345]

Any chance to get this merged? Really missing this feature :)

[ctmay4]

This fixes a big annoyance. Can't wait!