Switched back to char-based triple quotes detection for docstring element types (PY-11585)
Made builtins cache valid only if it has a valid reference to the builtins file (PY-11665)

A temporary builtins cache with no builtins file has been considered
valid before and thus has been never invalidated.
Added error message for missing python-skeletons diagnostics (PY-10411)
Merge branch 'python-fixes'
IDEA-118569 Add quick doc for live template lookup items
Extend block support API
ListTemplateAction should provide custom live templates
IDEA-118419 Keep caret on the screen while changing font size, IDEA-117005 File can be scrolled automatically on setting a breakpoint
EA-52292 fix (PHP template inside HTML comment case)
use getElement instead of getParent