Add a "fit inner" option to sessions/contributions

[pferreir]

This could be added either as a standalone function for each session block, or as an option in the "reschedule" dialog... or maybe both.
Maybe a good solution would be to have:

• A checkbox in the "reschedule" dialog that will do it for every block before rescheduling them;
• An individual "fit to content" feature for each session block;

[Ian Rolewicz <ian.rolewicz@…>]

In [6b4ff51db4c3dfbd7f067074354ab5d24dbcd201]:

[IMP] Add 'Fit to content' actions to timetable

• fixes #398
• Added the 'Fit to content' link in interval timetables in order to let the user adjust the start-end dates of the interval with respect to its content.
• The link opens a confirmation popup.
• The 'fitting' of a session is done automatically when fitting a block of this session
• Added a third step to the Reschedule popup in order to fit all the sessions this timetable contains before rescheduling. This third step is only available for top-level timetable and this option can be used now independantly of the rescheduling (i.e. we let rescheduling even if none of the first step options are checked if the third step is done).
• Added examples for each type of rescheduling.

[Ian Rolewicz <ian.rolewicz@…>]

In [6b4ff51db4c3dfbd7f067074354ab5d24dbcd201]:

[IMP] Add 'Fit to content' actions to timetable

• fixes #398
• Added the 'Fit to content' link in interval timetables in order to let the user adjust the start-end dates of the interval with respect to its content.
• The link opens a confirmation popup.
• The 'fitting' of a session is done automatically when fitting a block of this session
• Added a third step to the Reschedule popup in order to fit all the sessions this timetable contains before rescheduling. This third step is only available for top-level timetable and this option can be used now independantly of the rescheduling (i.e. we let rescheduling even if none of the first step options are checked if the third step is done).
• Added examples for each type of rescheduling.

[Ian Rolewicz <ian.rolewicz@…>]

In [6b4ff51db4c3dfbd7f067074354ab5d24dbcd201]:

[IMP] Add 'Fit to content' actions to timetable

• fixes #398
• Added the 'Fit to content' link in interval timetables in order to let the user adjust the start-end dates of the interval with respect to its content.
• The link opens a confirmation popup.
• The 'fitting' of a session is done automatically when fitting a block of this session
• Added a third step to the Reschedule popup in order to fit all the sessions this timetable contains before rescheduling. This third step is only available for top-level timetable and this option can be used now independantly of the rescheduling (i.e. we let rescheduling even if none of the first step options are checked if the third step is done).
• Added examples for each type of rescheduling.