Open feature form from log

This MR allows to open feature form from log/time_series views by clicking on a item (point, bar, or stratigraphic item).

The feature is available for all types of columns (unless I forget one), except imagery type (not hard to add but I don't see the benefit...).

Of course, there is the particular case of continuous data. As all the points are contained in a single feature, it's always the same that will be selected for form display.