cannot add items, filter hosts, and more in bar reports

(1) If we go to "Reports" -> "Bar reports", press "Add" to add items, select an item, and press "Add" in the popup, the popup will not close.

(2) A similar problem can also be observed when trying to add periods for "Distribution of values for multiple items". Also, in this period popup, the caption field is too short (see caption-field-short.png).

(3) If we choose "Compare values for multiple periods" and select a particular host group, it does not have any effect (see select-group-noop.png) on the host list.