Doc: add link to field descriptions from Editor settings topic
Add link to "Viewing Function Tooltips".
Update screenshot, because the tooltip fields were moved around.
Change-Id: Ic5e8d3d8c9a859c6a6748d631640b42239ea6f3f
Reviewed-by:
Nikolai Kosjar <nikolai.kosjar@digia.com>

| W: | H:
| W: | H:

