Although using menu items for these is not very practical, it helps
discoverability, and they're more useful and intuitive than 'Transpose
Current Line'.
This copies the current document text and properties into a new
document, similar to the old Save As 'Open file in a new tab'
option, but easier to understand and decoupled from saving.
One notable difference is that the new document does not copy the
filename - the old behaviour was confusing and error-prone for the
user (e.g. editing two documents with the same filename).
With newer GTK+ releases, leaving this field blank causes the "Recent
Files" "feature" to be used rather the the expected current working
directory. No replacement text added to explain the new behaviour since
it would be incorrect with older GTK+ versions, would likely be incorrect
on Windows with native dialogs and it will possibly be reverted in GTK+
in the future.
Recenerate HTML manual, including previous changes from other commits.
Now there is a dialog instead of a menu for selecting the color
schemes, the item under View->Editor can be created with Glade like the
rest of the menu.
Add configuration option tab_close_switch_to_mru to allow the user
to choose whether to switch to the most recently used tab or to the
next one after closing the current tab.
Remove `font-set` signal from Glade file since it's dependent on the VTE
being available and connect it from `vte.c`.
Add `color-set` handlers for foreground and background color preferences.
