Added restart and shutdown links in settings.

No longer exposing passwords in html forms.
Removed some old headphones js.
Minor styling adjustments.
Current activity on home screen now works.
Some history table fixes and additions.
Info screen for video items now works.

data/interfaces/default/current_activity_header.html

@@ -0,0 +1,9 @@
+% if activity != None:
+    % if activity == '0':
+        <h3>Activity</h3>
+    % else:
+        <h3>Activity <strong>${activity}</strong> stream(s)</h3>
+    % endif
+% else:
+    <h3>Activity</h3>
+% endif