fix automatic capitalization in message composing

[dozro]

Description

removed auto capitalization on the login page ➔ moved to #131
added auto capitalization on the message input (because #93)

Fixes #93

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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

[dozro]

works… sometimes… somehow not always… on iOS anyways…
todo: maybe recognize when in code block and disable auto capitalization there