Well this is probably too small but here's a suggestion, when you click on "add Component" the input box should be focused so you can start writing.
If you have compizconfig-settings-manager installed, you can change "Focus Prevention Level" from "Low" to "Off". The setting is located at "Genetal Options > Focus & Raise Behaviour". This will allow the "Add Component" window to maintain focus. (Source: askubuntu.com)
Thanks for the answer, I changed to i3wm for other reasons and "add component" started to maintain focus even though the focus prevention level is still at low. It might have been something with gnome shell...