This takes out the old user and room settings, replacing the paths with the new dialog editions. The labs setting has been removed in order to support this change.
In addition to removing the old components outright, some older components which were only used by the settings pages have been removed. The exception is the ColorSettings component as it has a high chance of sticking around in the future.
Styles that were shared by the settings components have been broken out to dedicated sections, making it easier to remove the old styles entirely.
Some stability testing of the app has been performed to ensure the app still works, however given the scope of this change there is a possibility of some broken functionality.
This allows Webpack to insert the proper image URL after builds steps like
adding a hash and so on. The path you supply to `require` is relative to the JS
source file, just like any other would be.
This simplifies the implementation of the button but also adjusts the appeareance such that a warning triangle appears in the top-right of button if an error has occured. The error popup will now appear when hovering over the button (with related CSS).
