Crash when Action is deleted in OI

Original Reporter info from Mantis: Blaazen @Blaazen

• Reporter name: Vojtech Cihak

Description:

Lazarus crashes when Action is deleted in OI while ActionList Editor is opened.

Steps to reproduce:

1. Open demo
   
2. Open AnchorList Editor
   
3. Delete one of three action in Object Inspector (Del key or context menu, no matter)

It leads to Access Violation, pressing Cancel terminates Lazarus

Additional information:

Lazarus 1.5 r48159M FPC 3.1.1 x86_64-linux-qt

Mantis conversion info:

• Mantis ID: 27624
• OS: Linux
• OS Build: Chakra 64-bit
• Build: 48159
• Platform: amd64
• Version: 1.5 (SVN)
• Fixed in revision: r48187 (#85dae094)
• Monitored by: » @zeljan1 (Zeljan Rikalo)