improved styling (padding and margin) around buttons in the expo info dialog (located inside start screen, tablet and mobile view)
fixed displaying of worksheet and expo files button opening dialogs - previously they were displayed on tablet and mobile view inside expo info dialog even when there were no files of particular exposition
fixed styling and displaying of pin and unpin and more actions buttons of expo card in /expositions route (iOS problem)
general refactor of fields of filter header inside /expositions route