Add a Timeline (a set of scheduled activities) to a case

Summary
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Provide users with a way to add pre-configured sets of scheduled activities to an existing case.

Implementation
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1. New field in Case View form - "Add Timeline" (timeline_id). Select field uses same options as the report_id field ($reports array)
(I've add this field to form class and tpl already)

2. The button needs on onclick function that does the following:

• check than a non-null option is selected
• give Jscript confirm (the text for this is already in the tpl)
• redirect to the URL which will do the processing (see next section)

3. Processing rules
NOTE: Modify the existing function used by Open Case and Change Case Type to populate the "standard timeline" activity set - such that it can do this "variation"

• Insert an activity record for each activity in the selected activity set EXCEPT if it would violate the max_instances rule for that activity type
• Due dates are set using reference_offset days - added to now(), timestamp part is current time
• Status set to Scheduled for all inserted records
• Set is_auto = 1

After inserts, reload Case View form with status message : "$activitySet activities have been added to the schedule for this case."