Changing theme returns user to empty browser fragment
This MR fixes #97 (closed); a bug that redirected the user to an empty browser screen every time the app theme changed.
Changes:
- When a user changes the app theme from the BrowserFragment (i.e from an open tab), they are redirected back to the tab after the theme is changed.
- When a user changes the app theme from the HomeFragment (i.e the home screen), they are redirected back to the home screen after the theme is changed.