[Feature request] Allow setting cursor and cursor text colors

[ghost]

There currently is no setting at all for setting the colors of the cursor and of cursor text.
This should be easy to implement as libvte exposes these:

vte_terminal_set_color_cursor
vte_terminal_set_color_cursor_foreground

I would kindly suggest adding these 2 settings, Currently, all LXTerminal does is to invert the text.