Problem:    ml_get error when switching buffer in Visual mode.
Solution:   End Visual mode when switching buffer. (closes #10902)

Problem:    Astro files are not detected.
Solution:   Add a pattern to match Astro files. (Emilia Zapata, closes #10904)

Problem:    Finding value in list may require a for loop.
Solution:   Add indexof(). (Yegappan Lakshmanan, closes #10903)

Problem:    Metafun files are not recogized.
Solution:   Add filetype detection patterns.

Problem:    Cursor displayed in wrong position after removing text prop. (Ben
            Jackson)
Solution:   Invalidate the cursor position. (closes #10898)

Problem:    Search and match highlgith interfere with virtual text highlight.
            (Ben Jackson)
Solution:   Check for match highlight after text properties.  Reset and
            restore search highlight when showing virtual text.
            (closes #10892)

Problem:    Possible invalid memory access when 'cmdheight' is zero. (Martin
            Tournoij)
Solution:   Avoid going over the end of w_lines[] when w_height is Rows.
            (closes #10882)

Problem:    Messages test fails; window size incorrect when 'cmdheight' is
            made smaller.
Solution:   Properly cleanup after test with cmdheight zero.  Resize windows
            correctly when 'cmdheight' gets smaller.

Problem:    The way 'cmdheight' can be made zero is inconsistent.
Solution:   Only make 'cmdheight' zero when setting it explicitly, not when
            resizing windows. (closes #10890)

Problem:    Invalid memory access for text prop without highlight.
Solution:   Check for a valid highlight ID.