Fix Rofi Staying Open Issue & Change Lock Screen Text

- Fix issue where rofi would stay open after selecting a session
  management option (e.g. lock) which would prevent screen from locking
- Change lock screen text to say "Enter password to unlock..."

.scripts/session.sh

@@ -25,7 +25,7 @@ rofi_menu() {
     option=$(printf '%s\n' "${choice}" | awk '{print $NF}')
 
     if [[ "$option" != "quit" ]]; then
-        main "--$option"
+        main "--$option" && killall rofi
     fi
 }