PY-14384 Check that existing import is not relative when searching for duplicate imports
Remove dots before relative import source when replacing reference to moved package/module

For now we strive to replace relative imports with absolute imports
during "Move" refactoring. If we replace reference in specific
import element like in "from ..pkg import moved" we substitute
import statement altogether with "..pkg" part. However if reference was
in source part of relative import, e.g. "from ..moved import smth",
previously we'd only replaced corresponding reference expression
("moved") and left preceding dots untouched, and that was wrong.
@Nullable
IDEA-132749 IAE at com.intellij.openapi.fileEditor.impl.EditorWindow.requestFocus [^vasya]
IDEA-133002 1 sec delay to edit "do not step into classes" in settings > Build, Exec, Deploy > Debugger > Stepping
fixed connection error in ipython v 4
Merge remote-tracking branch 'origin/master'
added icon for remote python sdk
use icon for remote python sdk in cell renderer