Keyboard focus related bugs

[ginnyTheCat]

Description

Fixes some keyboard focus related bugs:

• Focus input on emoji board opening (not on mobile)
  Fixes Opening Emojiboard does not focus on the input field #62
• Focus the end of a message when editing
• Focus search input when opening room message search
• Focus member input when opening room member page (not on mobile)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Preview: https://620158d3df66852adbc8dc5a--pr-cinny.netlify.app
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