Tweak argument input text view height to work better with the text view’s internal margins.

Classes/Editing/Argument Input Views/FLEXArgumentInputTextView.m

@@ -70,7 +70,7 @@
 
 - (CGFloat)inputTextViewHeight
 {
-    return ceil([[self class] inputFont].lineHeight * self.numberOfInputLines) + 20.0;
+    return ceil([[self class] inputFont].lineHeight * self.numberOfInputLines) + 16.0;
 }
 
 - (CGSize)sizeThatFits:(CGSize)size