included an additional instruction to simple, rubric, and mixeval

The additional instruction that is being added to the students'
evaluation forms is the note that the evaluation can be
repeatedly submitted until the release_date_end. The reason
for the note is that students no longer have to contact their
instructor to reopen the evaluation for them if they want to
resubmit. The feature was implemented for version 3.0
fixed events add/edit toggle

When the user switches from survey back to one of the other
evaluation templates, the results release dates stay hidden.
We have fixed the bug in this commit.