[Lazarus] TPageControl OnChange calling issue

[Ondrej Pokorny]

Then there's the problem with what behavior should be default. If we say 
LCL is VCL compatible then it is clear, but the more I think about it 
the more I feel Delphi behavior is just strange. Probably thinking is 
not appropriate here...

The same problem is with TComboBox Style=csDropDownList. If ItemIndex is 
changed from code, OnChange is not fired. Now LCL is VCL compatible but 
it's the same case. Unfortunately TComboBox doesn't have an Options 
property.

Ondrej