fix for the line border color when we have one vertical split.
pane-status
use 'screen' for drawing pane status.
size formatters
disable word wrap for status pane.
automatic-rename option working. window/pane titels.
mostly code style
pane status formatting.
pane status formatting.
merged feedback from Nicholas.
bug fix.
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background colour for pane titles.
formatting of inactive panes, background-color priority.