[BUG] - if add PV from search window and the PV already exists, it's added again

[jjanice]

Describe the bug

I had WATR:LI02:1:TANK_LV as a pv, did a search for WATR:*:TANK_LV, then added 6 including WATR:LI02:1:TANK_LV, and had that PV twice in the list. It'd be nice if it didn't add duplicates.

Expected behavior

I expected it not to add a duplicate PV.

Steps to Reproduce

Described above.

Possible solution (optional)

I can think of one use case for duplicate PVs - have the same PV with different y axes - zoom into low level hash with one and have another show larger swings. Somehow the addition from the search surprised me.

My platform

nomachine -> physics@lcls-srv01 -> trace

Additional context

No response