App bar color issues, with default teal theme

[klinker24]

When using the default theme for the app (teal), if you enter a conversation, then back out of it, it isn't going to change the app bar back to teal.

Steps to reproduce:

1. Login with a user that is using the default color theme (teal)
2. Enter a conversation and notice the app bar changes to the color, for that conversation
3. Back out to the conversation list
4. The app bar color will still be the same as it was, within the conversation

[klinker24]

done with: https://github.com/klinker-apps/messenger-web/commit/471de5891ce304a7986f46dcb773a4e768bcd836