Description of problem:
A collection of minor issues in rex UI that don't hamper functionality but can seem strange to users

Version-Release number of selected component (if applicable):
6.13 sn 5

1. tooltip for cronline (under Schedule > Recurring execution in the new wizard) combines "a,b,c..." and "1,2,3..." and has strange indentation (see screen 1)

2. tooltip for "time to pickup" should say that the setting applies only to pull-mqtt hosts. The global setting description for Time to pickup could state that too.

3. Time to pickup selection could be displayed in job invocation detail like it is with timeout to kill 
(screen 2)

4. If you hit a rerun on job invocation detail page, the host search query gets an additional pair of brackets (screen 3 after a couple of re-runs)