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)

Problem:    File renamed twice in test; missing feature check.
Solution:   Remove a rename() call.  Add check for cryptv feature.
            (closes #11564)

Problem:    Virtual text property highlight ignores window background.
Solution:   Combine text prop attribute with win_attr into extra_attr.
            (closes #11462)

Problem:    'smoothscroll' cursor calculations wrong when 'number' is set.
Solution:   Correct the code that computes the width. (closes #11492)

Problem:    May redraw when not needed, causing slow scrolling.
Solution:   Do not redraw when w_skipcol doesn't change.  When w_skipcol
            changes only redraw from the top. (issue #11559)

Problem:    Virtual text below after match has wrong highlight.
Solution:   Restore search_attr only after the virtual text.
            (closes #11446)