Detail Panel: dimmed topic icons should be clickable

[jri]

In the detail panel's "related topic" lists: currently when a topic is part of the current topicmap its icon is dimmed and does not respond to clicks. But it should respond to clicks because the user might want

• reveal the respective association (in case it was hidden)
• see *where* the topic is located on the map (when it is not in the viewport)

[Jörg Richter]

Page Panel: icon vs link click behavior (#579).

In the detail panel's "related topic" lists: when the topic is contained in the current topicmap its icon is surrounded by a thin red line (instead of dimming it). When such an icon is clicked the respective association is revealed (in case it was hidden) and the topicmap is translated to bring the topic into the viewport (in case it was outside the viewport).

CHANGES

dm4c.render.icon_link() got a 4th parameter: css_class - the class(es) to add to the <img> element.

See #579.

• Changeset: 8d79cf5e17a8679159a52353abbecd78d9c10f19
• URL: ​https://github.com/jri/deepamehta/commit/8d79cf5e17a8679159a52353abbecd78d9c10f19