This patch restores the functionality to validate attachments by
mime-type and filesize, adds "text/xml" as valid mime-type and improves
the forms for creating Topics and creating/editing Posts form by:
Adding and using a new attribute "labelFor" the the RowViewHelper
allowing to connect labels with their according inputs
Styling the error text for an input and the general form errors on
form submission using bootstrap styles
Marking required inputs as such in order to prevent empty submissions
Aligning order and button-style for the back-button with other
back-buttons in the extension
Separating the attachments and subscription form-group in bootstrap
template
This patch restores the functionality to validate attachments by mime-type and filesize, adds "text/xml" as valid mime-type and improves the forms for creating Topics and creating/editing Posts form by: