add actions to sensors in js gui, including links for clipboarding

see commit https://github.com/ahgittin/brooklyn/commit/1f15a633ebd22872350d80255955c59f8e84a2dd which is the main one

there is some mess, explained in the pull request, but i think if it works well we should not spend much time cleaning it as we should be able to do a big replacement when zeroclipboard 2.0.0 comes out as it allegedly supports hover properly!