================================================
This feature adds a new filter entry "Multiple Filters" in the combobox of the filter.
This enables to define a "Multiple Filter" based on the aggregation of individual filters. So it basically provides for a user defined filter based on constraint types.
This "Multiple Filter" defaults to "All Constraints", and can be defined using the button "..." next to the filter combobox.
The "Multiple Filter" works on the list of constraints, as any other filter, limiting the elements shown in the list to match the multi filter definition.
The "Multiple Filter" interacts with the visibility options as any other filter. This is, in visibility non-tracking mode, it does not change the visibility. The Buttons "Hide Listed" and
"Show Listed" can be operated in this mode as any other filter.
In visibility tracking-mode, it will adapt the visibility of the constraints in the 3D view to the "Multi Filter" definition (exactly as it would to any other filter with its own definition).
1539467631