Rename "All Files" to "All file types" release QM

Translations didn't work because I didn't "release" within Linguist.  I
wonder how to update the *.ts files with missing strings...
(cherry picked from commit 49c2f6bad1)

src/core/song.cpp

@@ -1076,7 +1076,7 @@ void song::importProject()
 			tr("FL Studio projects") +
 			" (*.flp"
 			 	");;" +
-			tr("All Files") +
+			tr("All file types") +
 			" (*.*)");
 
 	ofd.setFileMode( QFileDialog::ExistingFiles );