Fix width calculation of the pager views' line number column
Add mapping for --author-date-order to commit-order
Remove bold formatting from view column section in tigrc(5)
Add support for toggling the mouse option
Really parse --notes command line argument

This improves 5ab2907e093f5a1601c708ebb854d51c6c501135 to parse --notes
in addition to --show-notes.
Fix parsing of show-notes option