Fix postFilterTest to actually do what it says

I'm pretty sure that the check for the main view was meant to be done with the
commit selected in the commits panel, not with the first file of the commit
files view selected, so it was pressing enter too early. It's pure coincidence
that the test worked.

pkg/integration/tests/filter_by_path/shared.go

@@ -27,13 +27,15 @@ func postFilterTest(t *TestDriver) {
 			Contains(`only filterFile`).IsSelected(),
 			Contains(`both files`),
 		).
-		SelectNextItem().
-		PressEnter()
+		SelectNextItem()
 
 	// we only show the filtered file's changes in the main view
 	t.Views().Main().
 		Content(Contains("filterFile").DoesNotContain("otherFile"))
 
+	t.Views().Commits().
+		PressEnter()
+
 	// when you click into the commit itself, you see all files from that commit
 	t.Views().CommitFiles().
 		IsFocused().