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.
PLGEDT-44 Extract interface for breakpoint manager
PLGEDT-44 Add an interface for a breakpoint renderer
PLGEDT-44 Add resources for breakpoint marks
PLGEDT-44 Add gutter constants
Gutter annotation renderer: Lower log level to debug
PLGEDT-44 Use Gutters constants in GutterAnnotationRenderer
Create an abstract implementation of embedded document
Set file on EmbeddedDocument
PLGEDT-44 Implement breakpoint renderer
PLGEDT-44 Add an interface for styling lines
PLGEDT-44 Add a 'debug line' style
PLGEDT-44 implement BreakpointManager