Object Inspector show inconsistent behaviour when I click different items in the grid

Original Reporter info from Mantis: Alextpp @Alexey-T1

• Reporter name: CudaText man

Description:

Main discussion- https://forum.lazarus.freepascal.org/index.php?topic=54995
User tells us that O.I. selects-all the clicked field - under Windows, but not under Linux gtk2.
My video confirms it (Ubuntu gtk2) - when I focus different O.I. fields, they are perform select-all or not.
Even the same field can perform select-all or not.

Additional information:

I see for a short time (0.2sec) that many fields do select-all, then selection is lost.

Mantis conversion info:

• Mantis ID: 39015
• Platform: Ubuntu 20 x64
• Version: 2.1 (SVN)