[Bug] "Problem data are" should be "Problem data is".

[RokeJulianLockhart]

An example is the undermentioned, where "be" had been replacement-conjugated for a plural:

...whereas it should have been so for an uncountable noun.

Unfortunately, I've been unable to locate the string in the current codebase. All I see is:

gnome-abrt/po/en_GB.po

Lines 38 to 40 in 2b9c808

	#| msgid "_Open the problem data directory"
	msgid "_Open problem data directory"
	msgstr "_Open the problem data directory"