ACC-226 [iOS] Apply new colors in Conversations List

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PR Submission Checklist for internal contributors

• The PR Title

  • [x] conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • [x] contains a reference JIRA issue number like SQPIT-764
  • [x] answers the question: If merged, this PR will: ... ³

• The PR Description

  • [x] is free of optional paragraphs and you have filled the relevant parts to the best of your ability

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What's new in this PR?

Updated the appearance of the tab bar according to the figma.

Needs releases with:

This PR is a second part of the conversation list PR. Needs to be merged after the first part.

• [x] GitHub link to other pull request

Testing

Test Coverage (Optional)

• [x] I have added automated test to this contribution

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PR Post Submission Checklist for internal contributors (Optional)

• [x] Wire's Github Workflow has automatically linked the PR to a JIRA issue

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PR Post Merge Checklist for internal contributors

• [ ] If any soft of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

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References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

Codecov Report

Merging #5796 (71dca71) into feature/apply-new-colors-in-conversations-list (ce14d37) will increase coverage by 0.00%. The diff coverage is 91.80%.

:exclamation: Current head 71dca71 differs from pull request most recent head 3d8272c. Consider uploading reports for the commit 3d8272c to get more accurate results

@@                               Coverage Diff                                @@
##           feature/apply-new-colors-in-conversations-list    #5796    +/-   ##
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  Coverage                                           60.54%   60.55%            
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  Files                                                1017     1019     +2     
  Lines                                               56702    56813   +111     
  Branches                                            23539    23577    +38     
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+ Hits                                                34333    34405    +72     
- Misses                                              21997    22035    +38     
- Partials                                              372      373     +1     

This PR was closed as I was very outdated and most of the code was either not related to the topic or fixed somewhere else.