Changes necessary to provide new scientific notebooks support with separated source code editor and output preview.

IPython specific syntax is captured by console parser, including:
* Multiline magic
* Exclamation in suffixes
* Double exclamation
* Help syntax

Test classes for console moved to separate package.
PY-32597 Tests for regular Python in console added

PyConsoleParser code simplified.

IPython specific syntax is captured by console parser, including:
* Multiline magic
* Exclamation in suffixes
* Double exclamation
* Help syntax

Test classes for console moved to separate package.

IDEA-184388: Exception on pressing "context menu button" if there is no context menu in the current UI component