Link aggregation lacks link_speed, link_state and admin_state.

Link Aggregation should be treated as normal port which has link_speed,
link_state and admin_state. In the monitor tab, a link aggregation's
link_speed is 0 if it is down (link_state down). Otherwise (link_state
up) its real link speed is shown.

Signed-off-by: Min Chen <minchnew@gmail.com>
Simple Data Loading dialog.

If there are several bridges configured on the switch and some of them
contains many ports, page loading speed can be ridiculously slow. Added
a Bootstrap 3 style progresss bar while loading data.

Signed-off-by: Min Chen <minchnew@gmail.com>