Optimized .vimrc for usage on remote machines with kitty

.vimrc

@@ -1,19 +1,64 @@
+" Mouse support
+set mouse=a
+set ttymouse=sgr
+set balloonevalterm
+" Styled and colored underline support
+let &t_AU = "\e[58:5:%dm"
+let &t_8u = "\e[58:2:%lu:%lu:%lum"
+let &t_Us = "\e[4:2m"
+let &t_Cs = "\e[4:3m"
+let &t_ds = "\e[4:4m"
+let &t_Ds = "\e[4:5m"
+let &t_Ce = "\e[4:0m"
+" Strikethrough
+let &t_Ts = "\e[9m"
+let &t_Te = "\e[29m"
+" Truecolor support
+let &t_8f = "\e[38:2:%lu:%lu:%lum"
+let &t_8b = "\e[48:2:%lu:%lu:%lum"
+let &t_RF = "\e]10;?\e\\"
+let &t_RB = "\e]11;?\e\\"
+" 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"
+" Focus tracking
+let &t_fe = "\e[?1004h"
+let &t_fd = "\e[?1004l"
+execute "set <FocusGained>=\<Esc>[I"
+execute "set <FocusLost>=\<Esc>[O"
+" Window title
+let &t_ST = "\e[22;2t"
+let &t_RT = "\e[23;2t"
+
+" vim hardcodes background color erase even if the terminfo file does
+" not contain bce. This causes incorrect background rendering when
+" using a color theme with a background color in terminals such as
+" kitty that do not support background color erase.
+let &t_ut=''
+
+
 " Options
 set autoindent
 set backspace=indent,eol,start
 set clipboard+=unnamedplus
 set cursorline
 set expandtab
-set foldmethod=expr
-set foldexpr=nvim_treesitter#foldexpr()
 set ignorecase
-set mouse=a
 set number
 set relativenumber
 set scrolloff=4
 set shiftwidth=2
 set showmode
-set signcolumn=yes
 set smartcase
 set smartindent
 set spelllang=en
@@ -51,8 +96,3 @@ nnoremap <leader>sx :close<CR> " Close current split
 nnoremap <leader>w :w<CR> " Write buffer
 nnoremap J 5j " Move 5 lines down
 nnoremap K 5k " Move 5 lines up
-nnoremap j v:count == 0 ? 'gj' : 'j' " Move vertically
-nnoremap k v:count == 0 ? 'gk' : 'k' " Move vertically
-
-vnoremap <M-k> :m '<-2<CR>gv=gv " Move line down in visual mode
-vnoremap <M-k> :m '>+1<CR>gv=gv " Move line up in visual mode