🐛 Pressing tab while focusing on column type dropdown crashes heidi

[bigopon]

Steps to reproduce this issue

1. Step 1; Open any table
2. Step 2; Expand column type to focus
3. Step 3; press Tab
4. Then I get... crash

Current behavior

It crashes every time.

---

date/time : 2018-04-28, 08:03:24, 53ms
operating system : Windows 10 Tablet PC x64 build 16299
system language : English
program up time : 22 seconds
allocated memory : 63.59 MB
executable : heidisql.exe
exec. date/time : 2017-12-19 15:46
version : 9.5.0.5196
compiled with : Delphi XE5
madExcept version : 4.0.12
callstack crc : $fbba1a69, $b1006d98, $b1006d98
exception number : 1
exception class : EExternalException
exception message : External exception C000001D.

main thread ($33c4):
00d48668 heidisql.exe
008dde0b heidisql.exe VirtualTrees 18088 +53 TBaseVirtualTree.Animate
008bfe96 heidisql.exe VirtualTrees 5741 +56 TVirtualTreeHintWindow.ActivateHint
006a4f13 heidisql.exe Vcl.Controls THintWindow.ActivateHintData
00816daf heidisql.exe Vcl.Forms TApplication.ActivateHint
008163a2 heidisql.exe Vcl.Forms TApplication.HintTimerExpired
00810ebd heidisql.exe Vcl.Forms HintTimerProc
7ffa0682 USER32.dll DispatchMessageW
0081469f heidisql.exe Vcl.Forms TApplication.ProcessMessage
00814713 heidisql.exe Vcl.Forms TApplication.HandleMessage
00814bff heidisql.exe Vcl.Forms TApplication.Run
00ca0637 heidisql.exe heidisql 80 +24 initialization
7ffa0858 KERNEL32.DLL BaseThreadInitThunk
7ffa086c ntdll.dll RtlUserThreadStart

[fifonik]

I do not have such issue with HeidiSQL 9.5.0.5280 & MySQL 5.7.19

[ansgarbecker]

No longer reproducible.

Related: #937