Problem:    Various comment and indent flaws.
Solution:   Improve comments and indenting.

Problem:    Key code checker doesn't check modifyOtherKeys resource.
Solution:   Request the modifyOtherKeys resource value.  Drop resource DCS
            responses.

Problem:    Some mouse scroll code is not in a good place.
Solution:   Refactor the code. (Christopher Plewright, closes #11561)

Problem:    Setting w_leftcol and handling side effects is confusing.
Solution:   Use a function to set w_leftcol() and handle side effects.

Problem:    Cursor moves too far with 'smoothscroll'.
Solution:   Only move as far as really needed. (Yee Cheng Chin, closes #11504)

Problem:    The builtin terminals are in one long list.
Solution:   Refactor into multiple lists and an index of the lists.

Problem:    With 'smoothscroll' cursor is one screen line too far down. (Ernie
            Rael)
Solution:   Add a test that currently has the wrong result so that a fix can
            be made. (issue #11436)

Problem:    Clinical Quality Language files are not recognized.
Solution:   Add the "*.cql" pattern. (Matthew Gramigna, closes #11452)

Problem:    Test for home key fails when 'term' is "tmux".
Solution:   Only save termcap entries that exist.  Adjust code for xHome to
            what xterm uses. (closes #11566)