Adapt the current course editor UI to allow bulk section and activity selection. All bulk actions will be implemented in future issues. However, this issue will cover the following:

• Enable/disable bulk editing (showing checkboxes in the activities and sections)
• The activity and section checkbox logic: when bulk editing is enabled, all checkboxes are enabled, however, when a user selects an element (section or activity) they can only select the same type.
• The sticky footer appears when bulk editing is enabled and disappears when bulk editing is disabled. The sticky footer will also:
  • Have a counter of the selected elements
  • A button to unselect everything selected
  • A button to close the bulk editing (yet to confirm)

If necessary, this issue may implement one simple action to test what happens when an action is performed.

the current bulk edition designs may vary once the prototype is finished. However, the general flow will remain almost the same as described below:

1) A new "bulk edition" will appear on the course header:

2) A sticky footer and select checkboxes will appear once the user clicks the bulk editing. Closing that sticky footer will disable the bulk editing.

3) Once the user selects some kind of element (activity or section), only the same element's checkboxes will be visible. The available actions will be different depending on the type of element selected.

4) If an action is clicked, all elements will be unselected, and the user can select either sections or activities again.