FMX - TEdit Border 없애기

1. Right click the edit control (let's say Edit1) and click 'Edit Custom Style'.

2. Expand 'edit1style1'.

3. Click background:TActiveStyleObject.

4. Clear the SourceLookup property.

Link -> https://stackoverflow.com/questions/22301536/how-to-make-an-edit-control-in-fmx-transparent-and-hide-its-border