Bug fixes (#394)

* fix black text for custom messages text

* fix file upload icon being stretched

* center github, docs, and discord icons in sidebar

* fix chat container being cut off on right side and tighter spacing between message

* fix default chat container being cut off on right side

* on create new workspace, take user to the workspace they just created instead of the home page

* add border to chat container and click outside user menu to close

* fix borders around all chat and settings containers to be consistent

* fix padding for default messages

* fix spacing between workspace items in sidebar

* fix margin around right side of chat, default, and settings containers to be the same as the left sidebar

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Co-authored-by: timothycarambat <rambat1010@gmail.com>