add tool for reset all processes of "exploer.exe"
tags loaded in the form TagManager
- Add use count for tags.

- Load tags in the form of TAGMANAGER, and order by use count desc.
- There will be only one form of TAGMANAGER shown even clicked the context menu cross explorer multi-times.
- adding tags is ok.(without associate with files)

- TBD: check if the new tag exists already.
- Setting tags in batch model(multi-files) supported now!
- adding tags with associating with files is ok now.