Refactoring: use super() calls if possible

[penguinolog]

• Stop using <ParentClass>.<method>.(self, ...) if only 1 parent / no MRO issues
• Do not expand size argument if maxcol is not used directly

Checklist

• I've ensured that similar functionality has not already been implemented
• I've ensured that similar functionality has not earlier been proposed and declined
• I've branched off the master or python-dual-support branch
• I've merged fresh upstream into my branch recently
• I've ran tox successfully in local environment
• I've included docstrings and/or documentation and/or examples for my code (if this is a new feature)

[coveralls]

coverage: 73.503%. remained the same when pulling b08ec53 on penguinolog:refactor_super into cce5326 on urwid:master.