initial re-design of Widget E based on Enrico's sketches. Search bar on top left can be used to filter events. Check boxes alongside events allow user to select for a group. These can then be dragged into an empty 'box' - will show maximum and minimum bounds of energy usage and display tag cloud/icons for group. Would an option to name the group be useful?

Need to add buttons/selector to switch between modes - energy, frequency, duration. 

idea for tag cloud - could be revealed on mouse over/click potentially.

TO DO:

date picker for Widget A and B