Added dirty functionality to dashboards. Added indication that data in the dashboard is not saved. Currently all row/panel editors support generally, plus query and timepicker panels support completely including dirty for every smallest change.

Signed-off-by: ohanetz <o.hanetz@gmail.com>
Added dirty implementation to all panels as well.

Signed-off-by: ohanetz <o.hanetz@gmail.com>
Merge branch 'master' of https://github.com/alexkoltun/logmind