Fix vseth components issues

Implement #128 (closed), #129 (closed), #130 (closed), #132 (closed), #133 (closed)

#128 (closed) Added link + info when editor is displayed

#129 (closed) Added tab index + keyboard actions. You will have to press tab + enter instead of just enter, but I think it is cleaner this way - @schmidbe Is that ok?

#130 (closed) Hide move button

#132 (closed) Added link

#133 (closed) Added CreatableSelect for meta1 / meta2 selection, more margins, now uses custom checkbox, fixed keyboard shortcuts