Feature - Modal Settings

Main Update:
- **Modal Design Settings now work**

All Updates: 
- Removed localhost as valid host to save access token
- Set up URL in headers of server requests to use the URL of the current window
- Made background of app transparent to remove white space behind rounded corners
- Updated so subtext has no left margin in mobile view
- Increased height of post button to match text box
- Added fb-root div to setting and modal views and removed fb files from widget view because fb is not used in widget view
- Updated default settings to add modal settings
- Added modal settings to settings panel; updated settings to only save integer forms of modal width/corners
- Removed button outlines and re-fixed post button heights
- Updated default settings to use rigid corners on modal
- Updated order of modal design settings and the default colors
- Set up modal to use the specified border width and corner roundness that the user chooses in the settings
- Removed the ability to change the corners of the overall modal, because it exposes the white background. Users can still change the corners of the blocks
- Fixed problem where border radius was messed up if visitor added a comment to a status with no comments previously
- Connected settings panel with modal. All user changes in the settings panel to the modal design is working now
- Lowered default border width for modal to size 3
- Fixed size of elements using heading font in mobile view - shrunk them down so they don't overflow