Steps to reproduce:

1. Open the attached project
2. Open the TestScene
3. Open Preferences -> General and Disable Query Builder for Hierarchy
4. Observe the Hierarchy's Search Field. Background placeholder text suggests using Tab to filter results
5. Try entering a Query and pressing the Tab button

Actual results: Nothing happens

Expected results: Either the Tab shortcut for Search Query filtering is functional, or the background text suggestion is removed

Actual results: Object's reference search query overlaps with the Search Bar's "Search Item" background text

Expected results: Search Bar's "Search Item" background text disappears when the Object's reference search query is entered

Reproducible with versions: 6000.3.0a2, 6000.3.0a6

Can’t test with versions: 6000.0.56f1, 6000.1.16f1, 6000.2.1f1, 6000.3.0a1 (Hierarchy V2 not available)

Tested on (OS): Ubuntu 24.04, macOS 15.6.1

Notes:

• When the Query Builder for Hierarchy Search is enabled, the Tab key can be used to open the Add New Query Block window. The background text suggestion is not present when Query Builder is enabled, however