Revert "IDEX-1473: Error message added when creating existing file or folder"

This reverts commit 158f84757cfcefed4734f322ee00c4c27e693383.
Revert "Merge remote-tracking branch 'origin/master' into IDEX-1473"

This reverts commit c8388b712b9d0d1fa2a67db8d695382d01c6bae2, reversing
changes made to 10909a7f2224852839de4d2516927dfe7c38e619.
Revert "IDEX-1473: Error message added when creating existing file"

This reverts commit 10909a7f2224852839de4d2516927dfe7c38e619.
Reverted to 6367462 commit
IDEUI-266: Improvements on Import From Location... wizard.
Merge branch 'master' of github.com:codenvy/ide
IDEX-1472: Just removed file is still opened in the editor
Merge pull request #308 from codenvy/IDEUI-266

IDEUI-266: Improvements on Import From Location... wizard.
Use different validators while renaming file/folder/project; refactoring
Fix 'Build' action state
IDEX-377 Used SafeHtml in builder and runner console. Fixed runner console styling
Merge pull request #310 from codenvy/build_action_fix

Fix 'Build' action state
IDEUI-266: make radiobuttons navigatable by keyboard
Fix saving Docker file for project-scoped runner environment
IDEUI-266: add privace navigation to create project wizard
IDEX-377 Fixed runner console output & IDEUI-368 removed font-weight attribute
Merge pull request #311 from codenvy/edit_env_fix

Fix saving Docker file for project-scoped runner environment
Merge pull request #313 from codenvy/IDEX-377

Idex 377
IDEUI-266: align label in FF.
Merge pull request #312 from codenvy/IDEUI-266

IDEUI-266: make radiobuttons navigatable by keyboard