Show the most severe message in status line and icon

[ykvch]

Feature request

Situation: Multiple pylint errors are detected on the same line (e.g. C0321 and E0602 ).
Rationale: It is usually more important to see Error over Warning or "line too long" message.

Actual behaviour: Single unsorted severity message is shown (usually this is the lowest severity, e.g C0321 instead of E0602).

Desired behaviour: Pick one message to show in the following order

1. any E???? error
2. any W???? warning
3. any other type of message

OR list all of them (starting with the most severe one) in status-line using some special icon to indicate that multiple errors appear on the same line.

Workaround available: Use ctrl+alt+c to see drop-down with all messages (not very handy though for delivering in-place alerts).