I don't know if maybe anyone else has noticed this or pointed it out, but in the message area under the Fleets button, the subheader (there is no header) looks like this:

where the blank is one of {Espionage, Combat Reports, Expeditions, Unions, Other}, depending on what tab you have selected. The word "Delete" is a link which deletes all messages; the rest is just text. It seems to me like there is a typo of some kind here: either the word "or" is a superfluous addition & the word "all" should also be linkified too, so that it reads like "Delete all in tab _____", or the word "all" should have some kind of verb before it & be a separate link together with that verb. But "Delete or all in tab Espionage" does not make linguistic sense.