At the moment, this feature will only show a question mark for segments
without a target folder defined; the question mark will not be displayed
if the admin created target but did not upload an annotation (i.e. not
fully configured the target). This shall be patched on a future commit
to check for the presence of a annotation image.

The buttons should now be the correct size in regards of the outer div,
even when the page is resized.

Before, for some page size, when there was just not enough space for one
button more, the outer div was shrunk, but the button was not, hence
producing an overflow of the button, which was not nice to see.

In the 'utils' module, the imports are relative to the current file; the
variables can not be named like an other module (here the variable 'sql'
was conflicting with the module 'sql').

If not present, the default is assumed to be "touching" and "none"

Display the notification for missing tenprint cards on the 'add file' page for the submitter accounts

This will load the page with all submission, THEN make a ajax query to
get all the submissions that contains missing informations. This is done
in two steps to have a fast loading page.

The query takes ~800ms for 100 submissions with the query done on the
server side before the loading, and only 70ms when done without this
information but loaded via ajax after. Since the backend function is the
same, the total time is the same, but at least the homepage will load
for the user.

We shall refactor the backend sql query to have only one query done
against postgresql.