Spinning button required en.yml, form & spec changes

The update consists of Changes to edit forms on properties, clients, charge cycles sheets, users.
en.yml used to change update button text on sheet (invoice text) and chargecycle (capitalize)
The update button had to have a new class to prevent icon buttons being changed. 
The sheet class has been updated to match the change to Invoice Text.
All the test changes were due to the change on the update button.