couldn't find an existing issue... maybe i'm creating duplicates myself here
at some point (1.8) zabbix changed from individual buttons for actions (below entity lists) to a dropdown & "go" button.
this is much worse for usability, as opening a dropdown and then choosing the action is :
a) more clicks;
b) slower, as one has to click the dropdown first, then scan the available entries and find the correct one
c) looks like crap when there's only single action
suggestion is to change back to buttons, maybe providing icons on buttons for even faster access
rationale at https://www.zabbix.org/wiki/Death_to_the_dropdowns