tui/terminfo_start: Default to normal-mode cursor shape. (#5419)

References #4867

For users who use a "bar" shape in the shell, it's annoying that Nvim starts
with that same cursor shape, despite starting in normal-mode. So default to the
normal-mode "block" shape instead. (Note: technically it's possible some user
may set 'insertmode', and then the opposite problem occurs. But 'insertmode' is
a silly option that shouldn't exist, and any user that uses it probably isn't
fiddling with their cursor shape anyways.)

Also rename the unibilium extensions:
    enter_insert_mode   => set_cursor_shape_bar
    enter_replace_mode  => set_cursor_shape_underline
    exit_insert_mode    => set_cursor_shape_block
to say explicitly what they do in the context of a terminal; it's irrelevant in
this context what purpose they serve in Nvim.

0 files changed, 0 insertions, 0 deletions