Improve search with selected properties

[progysm@…]

I suggest to add, if it's easy, a new syntax to search every object related to a current selection.

Example, we select one way with keyABC=value1. We now want to select every object with keyABC=value1. One possible syntax could be:
keyABC=selected.keyABC

it would be the same that if you search keyABC=value1 but you won't need to copy/paste the value in the search, only select one way and search.

I don't know if supporting multi-values (when you select many object with different values) could be good or to complicated.

So here are the 3 cases:

• one object selected: search with the value of the key
• many object selected with same key=>value, search with the common value
• many object with different value, no search (or create a more complicated expression with (key=value1 OR key=value2 OR key=value3).

Of course expression could be whatever is easier to parse:

• selected.key1 (java like)
• selectedkey1 (javascript like)
• [selected key1]
• selected#key1
• selected->key1 (C Struct/PHP like)
• selected::keys
• etc...

[simon04]

See #2625 for a similar enhancement. Personally, I consider #2625 a cleaner solution.

[Don-vip]

Closed as duplicate of #6935.