The file watcher does not track events properly after defined cases

[musienko-maxim]

Step to reproduce

Use-case with creating new package:

• Create a workspace base on Java stack. Open it and create the Spring project. Expand the project to org.eclipse.che.examples and select the package.
• Project -> New -> Java Package -> type package like: com.somepackage (with dot)
  Actual result: The just created package has not appeared in the Project explorer.
  Expected result the package should displayed in Project explorer

Use-case with deleting items from IDE:
Precondition: use two browser windows #1 and #2

• Create a workspace base on Java stack. Open it and create the Spring project. in the browser Update DTD for GWT-module descriptors #1. Expand the project. Open the READ.me file.
• Go to the just created workspace in the browser Package docker runner in Che #2. Select and open the README file too.
• Delete the file trough IDE

Use-case with coloring files under git

• Create for the Spring project with wizard and change content a file.
  Expected result the color of just edited in Project Explorer and opened tab file should be changed.
  Actual result: The file in Project Explorer and tab remains the same

[RomanNikitenko]

I've tested it on branch related to #7380 and the issue is already fixed there.
So I'm closing the issue.