Finds and removes dots and specks of various sizes.

Remove the dots in order to allow more accurate OCR detection.
| Framework | Member |
|---|---|
| .NET | DotRemoveCommand |
| .NET 6+ | DotRemoveCommand |
| iOS / OS X | LTDotRemoveCommand |
| Java | DotRemoveCommand |
| C DLL | L_DotRemoveBitmap |
| C++ Class Library | LBitmap::DotRemove |