Investigate the technical feasibility of implementing a sticky footer on the settings and view page

The UX roadmap includes a sticky footer with the buttons on the edit activity form. and we need to investigate the technical implications to understand if we can do it for 4.1 or 4.2.

Some related aspects  to evaluate that task:

• Evaluate if the sticky footers can be added to any page's quickform or if it is only applicable to specific cases like the activity/course settings.
• Evaluate the feasibility of using a quickform group for that sticky footer to customize the options.
• Define if by default the save and cancel standard options shall be part of that sticky footer (when the quick form specifies that uses the sticky footer).