showComposeDialog: Don't always set the title to replying
showComposeDialog: Don't always set the title to replying

Only set the title to "Replying to..." if we are indeed replying to something.

Signed-off-by: Gergely Nagy <0efc652ff6792fef6190e3f066133e37a050e52a@gergo.csillger.hu>

algernon/mad-tooter,algernon/mad-tooter