LazControls: 3 filter controls need FilterOptions

Original Reporter info from Mantis: Alextp

• Reporter name: CudaText man

Description:

3 filter controls (TListFilterEdit, TTreeFilterEdit, TListviewFilterEdit) don't have props for case-sensitive filter.
Also good: option "filter matches only at beginning of string".
I suggest to add this to base unit (EditBtn.pas)

type
  TFilterStringOption = (
    fsoCaseSensitive,
    fsoMatchOnlyAtStart
    );
  TFilterStringOptions = set of TFilterStringOption;  

and add to base TCustomControlFilterEdit prop: FilterOptions.
Actual filtering works in final classes, but filteroptions should be in base class.
Then pls implement filteroptions in 3 filter controls.
Maybe I can make a patch.

Mantis conversion info:

• Mantis ID: 34057
• Version: 1.9 (SVN)
• Fixed in revision: r58673 (#deb177f7), r59225 (#d6624128), r59226 (#b8f77626), r59555 (#cd487bb1)
• Monitored by: » @FTurtle (FTurtle), » @onpok (Ondrej Pokorny)