#576 no cursor default position when changing edition mode

[goofy]

On a blank new edition page, the cursor default position is top left (for ltr at leat). Fine.
Now click on HTML tags or Preview or even cycle to Normal and you have no cursor at all. So you cannot immediately insert any table or image or form without a first click where the cursor should be.
This is a very minor annoyance but is quite intriguing if you intend to insert a table right on top.