Request: Select all elements with specific filter

Migrated from: https://bugs.launchpad.net/inkscape/+bug/1715492

Use cases:

• I want to merge two filters in one => I can select all items by filter1, apply filter2, delete filter1
• I want to see which item is impacted by which filter => I can visualize them by selecting them

Implementation

Right click on a filter in a filter editor
Alternatively this can be an object in the Select Same menu items
Or both.

Workaround

1. Find the filter in the xml editor (should be in the defs)
2. Copy the id (i.e. filter34)
3. Open the Find dialog (Ctrl+F)
4. Search for url(#filter34), note the brackets are used to ensure uniqueness (if you use duplicate, there might also be a filter with id filter34-1, the brackets stop both from being picked up)