Open Package Window - Treeview upside down (Regression?)

Original Reporter info from Mantis: Hansaplast

• Reporter name: Hans Luijten

Description:

Since the past 2 SVN versions, when opening a package, the treeview bitmap will be upside down and only half of the content will be displayed.
Clicking on the treeview refreshes the view correctly though.
This happens most of the time, but not always - seems when packages have a lot of files (Required Packages not in view) things go OK.

Regression? Maybe related to a previous reported issue https://bugs.freepascal.org/view.php?id=32970

Steps to reproduce:

In IDE menu "Package, choose "Open Package File (*.lpk)" or "Open Recent Package".

Additional information:

Lazarus 2.1.0 r59167 FPC 3.0.4 x86_64-darwin-cocoa (alpha)

Mantis conversion info:

• Mantis ID: 34334
• OS: macOS
• OS Build: 10.14
• Build: r59167
• Platform: MacOS
• Version: 1.8.5 (SVN)
• Fixed in revision: 61288 (#95b9f913)