add ghostlink for easier edge selection (Fixes #131)

This changes our current svg. We already had a <g id="link-group">
and under it <path class="link graph"> elements (class changes for
selection).

Now we have <g class="link graph"> elements containing two paths:
one for display, one for selection.
the display has stroke-width of 2 (defined in res/css/style.css) and the
selection has stroke-width of 5 and stroke not defined to make it
invisible plus a higher z-index to catch the click.

0 files changed, 0 insertions, 0 deletions