Opens up a prompt for command to be typed to send to all windows
Usage:
Using Function Key
$F1::SlashPrompt()
Using Letters
$a::SlashPrompt()
Using Numbers
$1::SlashPrompt()
Using Alt 1
$!1::SlashPrompt()
Using Ctrl 1
$^1::SlashPrompt()
Using Shift 1
$+1::SlashPrompt()