This commit:
- increased the size of chat-header-offset from 46px to 56px on mobile
- tweaked navbar padding
- Increased the gap between back button and title; this means no more perfect alignment, but I think that's perfectly fine and a fair trade off for an easier click target for the back button without fear of hitting the title
Small visual improvements for chat header on mobile:
- makes the Back to Forum target size slightly narrower
- makes the text color consistent between header and back button (and d-icon)
- makes the chat heading bold
This change simplifies the layout of our header when chat is open on mobile. The search icon and hamburger menu icons are also hidden and the Discourse logo is replaced by a ← Forum link to make it easier to continue where you left off within the forum (prior to this update the user could only go back to the forum index page).