Feature Search : add a clear button to enable remove the triangle after search

[Don-Isdale]

Users report a need to clear the results of the Feature Search

From a user report 2024Oct23 16:58 in Pretzel Chats on MS Teams :

• Feature Search : add a clear button to enable remove the triangle after search

Requirements :

Add a Clear button near the Search button in Feature Search, or adjacent the count of blocks in the result.
The button will clear the results of the last search, i.e. the displayed feature search triangles and labels (not Genotype Search triangles, or clicked tracks).