"Ctrl+A should update the caret position"

I rebased the patches from issue #387 (closed) and make them a MR. I did not fix the warnings, though.

libview/ev-view.c: In function ‘ev_view_move_cursor’:
evince/libview/ev-view.c:6515:8: warning: ‘select_start_page’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (!get_caret_cursor_area (view, select_start_page, select_start_offset, &select_start_rect))
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
libview/ev-view.c:6515:8: warning: ‘select_start_offset’ may be used uninitialized in this function [-Wmaybe-uninitialized]

Closes #387 (closed)