Add possibility of hiding keybinds text

[mihalea]

Add flag '--hide-keybinds' allowing users to hide the help message below
the prompt containing the keybinds

[mattydebie]

Looking good at first sight. Will check this out properly soon!

[ickerwx]

This is a rofi theme thing. The message is displayed in the message UI block, which is a child of mainbox. So calling

$ bwmenu -- -theme-str "mainbox{children[prompt,entry,listview];}"

tells rofi to only show the mentioned elements, and specifically leaves out the message part. Or modify your rofi theme accordingly