Frontend: Spinning circle

[jakubklimek]

It should never show - there are no operations that should be database intensive.

Shows up randomly but often.

[skodapetr]

In fact some DB queries are time intensive .. more then 15 seconds .. but they appear only very often, so there is probably another problem.

[tomas-knap]

1. To general issue and 2) Solved to some extent, it does not show so often