templatekw: clarify the result of {latesttag} when no tag exists My initial expectation was that the list would be empty, and therefore detectable with {if()}. The map for {latesttag()} is populated with real values in this case (except {tag}), so it probably doesn't make any sense to change this to an empty list.

hgweb: position the "followlines" box close to latest cursor position

hgweb: add a floating tooltip to invite on followlines action In followlines.js, we create a <div id="followlines-tooltip"> element to draw attention of users on "followlines" feature. The element shows up on hover of source lines after one second and follows the cursor. After first click (start line selection), the text changes and indicates that next click will terminate selection.