Redrawing background file transfer window

[alik]

Situation:
* A local HDD directory with approx. 30 000 files (including subdirectories).
* A network directory with approx. 28 000 files (subset of the local ones).
* Order Total Commander to copy on background the local HDD directory to the network directory with "Skip all" on conflicts.

Current behavior of the background file transfer window:
* The window is redrawn for (probably) each file it tries to copy (showing the file name, even the conflicted ones).
* The progress bar and window title updates only when a new data is transfered (so no update when skipping files due to conflicts).

Suggested behavior of the background file transfer window:
* The file name is updated once per some amount of time (where the period should be between 300ms and 3s), not for every file name. This might faster the operation, especially when skipping files, based on the particular implementation.
* The progress bar, taskbar progress bar and window title is updated in the same interval as the file name, so even when skipping files. This might get better overview of the real progress.

The previous might also be valid for the foreground file transfer dialog, not tested on my side.