[Kitty] Keybinds update

Switch `kitty_mod' back to its default `ctrl+alt' value, however
some keybinds still use `alt' as their prefix.

Some keybinds changed to respect better the bépo layout

.config/kitty/kitty.conf

@@ -1011,7 +1011,7 @@ linux_display_server auto
 
 #:     map ctrl+f>2 set_font_size 20
 
-kitty_mod alt
+kitty_mod ctrl+shift
 
 #: The value of kitty_mod is used as the modifier for all default
 #: shortcuts, you can change it in your kitty.conf to change the
@@ -1033,7 +1033,7 @@ clear_all_shortcuts no
 
 #: Clipboard {{{
 
-map kitty_mod+c copy_to_clipboard
+map alt+c copy_to_clipboard
 
 #: There is also a copy_or_interrupt action that can be optionally
 #: mapped to Ctrl+c. It will copy only if there is a selection and
@@ -1041,8 +1041,8 @@ map kitty_mod+c copy_to_clipboard
 #: will copy and clear the selection or send an interrupt if there is
 #: no selection.
 
-map kitty_mod+v  paste_from_clipboard
-map shift+insert paste_from_selection
+map alt+v        paste_from_clipboard
+map kitty_mod+v  paste_from_selection
 map kitty_mod+o  pass_selection_to_program
 
 #: You can also pass the contents of the current selection to any
@@ -1063,9 +1063,9 @@ map kitty_mod+o  pass_selection_to_program
 #: Scrolling {{{
 
 map kitty_mod+up        scroll_line_up
-map kitty_mod+k         scroll_line_up
+map kitty_mod+s         scroll_line_up
 map kitty_mod+down      scroll_line_down
-map kitty_mod+j         scroll_line_down
+map kitty_mod+t         scroll_line_down
 map kitty_mod+page_up   scroll_page_up
 map kitty_mod+page_down scroll_page_down
 map kitty_mod+home      scroll_home
@@ -1140,8 +1140,8 @@ map kitty_mod+0 tenth_window
 
 #: Tab management {{{
 
-map kitty_mod+right next_tab
-map kitty_mod+left  previous_tab
+map kitty_mod+r     next_tab
+map kitty_mod+c     previous_tab
 map kitty_mod+t     new_tab
 map kitty_mod+q     close_tab
 map kitty_mod+.     move_tab_forward