add tooltips to input elements in new instance form

[stopfstedt]

based on user feedback we've received, not all input fields of the new instance form are self-explanatory. we have tooltips on some of these, but not on all.

in at least one instance, this lack of understanding has led to incorrect setup of an enrollment instance.

to illustrate the issue:

so let's add some tooltips to these input elements.

[ctam]

Hi @stopfstedt, could you provide a little more context? Specifically which fields the user had mistaken as what? This will help write precise descriptive tooltips for these fields.

Thanks!

[stopfstedt]

here all the current tooltips. the user failed to correctly specify the target group in the Moodle course. the input field for this form element has no tooltip.

[stopfstedt]

looking at the edit form for an already existing sync-instance, i see no tooltips at all.

ensure that all tooltips are present there as well.