[Lazarus] Groundwork for Undo in Form Designer

[Hans-Peter Diettrich]

Marc Weustink schrieb:

>> The benefit of many intermediate commits is to allow other developers 
>> to test my changes and give feedback, and also to prevent changes from 
>> deviating too much from the main code-base thus making merging harder 
>> later.
> 
> Which developers ?

All those who are willing to contribute to Lazarus, and which want to 
have new or improved features. Like me :-)

DoDi