Move sidebar to the left in users/show
Fix strings in my/edit_room and a few in spaces
Improve the warnings for users not confirmed yet

Instead of showing a warning on every single page load, shows a permanent
warning on the home page and on the account settings page.
Didn't change how confirmation works, just changed the warnings.
Improve views when admins are editing other users

Better messages to make clear that the admin is editing another user's account
or profile and not his.

refs #1146
Add a common user to the db seed in development mode

So that we can browse arond the site as a common user and resist
the temptation of testing stuff as the admin all the time
Adjustments for the default test user after 5e6daea05c3c7