Concept element view now expands to fit text
Concept element view now expands to fit text, properly. Prior version broken. Concept editor unlinked for the moment.
Editor element will appear over bubble on dblclick, disappearing on focus. Click-drag movement broken. pointer-events: none not compatible with this change.
Cell editor appear on cell dblclick. Cell Click+Drag works.
Improvements to textarea auto-resizing.
Changed default concept text to something more sensible.
Fixed bug in .editor textarea. Detailed in comment.
Very basic layout, top bar and map manager container.