Missing plural forms in translation

[Aurimas Fišeras]

Hello,
I noticed several places where plural forms are needed.

../src/gnome/glade/sched-xact.glade.h:171
../src/gnome/glade/sched-xact.glade.h:175
../src/gnome/glade/sched-xact.glade.h:179

In the dialog "Edit Scheduled Transactions", tab Frequency:

"Every " X "days."
"Every " X "weeks."
"Every " X "months."

Where X is a spin button.

It looks awful in Lithuanian (with only 1 of 3 plural forms), when 
"days.", "weeks.", "months." doesn't react to X changing.

Unfortunately there are more places with the same design: Overview tab 
of Scheduled transactions, preferences, etc.

Aurimas F.