Use new uba feature to choose browser if Ctrl is used

dotfiles/i3/config

 bindsym $mod+Return         exec "urxvt"
 bindsym $mod+Shift+Return   exec "xfce4-terminal"
 bindsym $mod+b              exec "saturnin www -1 | head -1 | uba -a"
+bindsym $mod+Ctrl+b         exec "saturnin www -1 | head -1 | uba -a -c"
 bindsym $mod+Shift+b        exec "saturnin www -1 | uba"
+bindsym $mod+Ctrl+Shift+b   exec "saturnin www -1 | uba -c"
 bindsym $mod+i              exec "saturnin menu www"
 bindsym $mod+Shift+i        exec "saturnin menu www_hist"
 bindsym $mod+c              exec "saturnin clip save"