vimrc: add some obscure control codes for kitty's sake

.vim/vimrc

@@ -1367,6 +1367,32 @@ set updatetime=250
 " set updatetime=200
 " set updatetime=100
 
+" https://sw.kovidgoyal.net/kitty/faq/#using-a-color-theme-with-a-background-color-does-not-work-well-in-vim
+" work around vim's background colour erase:
+"
+" vim hardcodes background color erase even if the terminfo file does
+" not contain bce (not to mention that libvte based terminals
+" incorrectly contain bce in their terminfo files). This causes
+" incorrect background rendering when using a color theme with a
+" background color.
+let &t_ut=''
+" Bracketed paste
+let &t_BE = "\e[?2004h"
+let &t_BD = "\e[?2004l"
+let &t_PS = "\e[200~"
+let &t_PE = "\e[201~"
+" Cursor control
+let &t_RC = "\e[?12$p"
+let &t_SH = "\e[%d q"
+let &t_RS = "\eP$q q\e\\"
+let &t_SI = "\e[5 q"
+let &t_SR = "\e[3 q"
+let &t_EI = "\e[1 q"
+let &t_VS = "\e[?12l"
+" Window title
+let &t_ST = "\e[22;2t"
+let &t_RT = "\e[23;2t"
+
 if (has('termguicolors'))
   set termguicolors
 else
@@ -1706,16 +1732,6 @@ nnoremap <leader>vr :source $MYVIMRC<cr>call RefreshUI()<cr>
 
 let base16colorspace=256
 
-" https://sw.kovidgoyal.net/kitty/faq/#using-a-color-theme-with-a-background-color-does-not-work-well-in-vim
-" work around vim's background colour erase:
-"
-" vim hardcodes background color erase even if the terminfo file does
-" not contain bce (not to mention that libvte based terminals
-" incorrectly contain bce in their terminfo files). This causes
-" incorrect background rendering when using a color theme with a
-" background color.
-let &t_ut=''
-
 " as per https://github.com/direnv/direnv/wiki/Vim
 if exists('$EXTRA_VIM')
   for path in split($EXTRA_VIM, ':')