make the changeUserUrl able to be overwritten

I use this in oebsv where I want to use a custom select in the changeUserController
HtmlParser - missing text-align option
fix for changeUser

use the right controllerUrl
only set switchContent display none if exists - bugfix for ie8
set autheduser_read to false if no user is logged in
padding bottom hack on youtube iframe and no width
new size field added to choose between fullWidth or custom for player size

is necessary for new responsive padding bottom style
add support for getComponentsByClass for StaticSelect generators

support is limited by not supporting looking up the first class
update old youtube videoWidths to new size mode
load cards assets only for backend
renamed videoWidth correctly for db design