Fix positioning of the first row.

Clocker/Panel/UI/BackgroundPanelView.swift

@@ -3,7 +3,7 @@
 import Cocoa
 
 struct BackgroundPanelConstants {
-    static let kArrowHeight: CGFloat = 8
+    static let kArrowHeight: CGFloat = 4
     static let kCornerRadius: CGFloat = 8
     static let kBorderWidth: CGFloat = 1
 }
@@ -56,9 +56,4 @@ class BackgroundPanelView: NSView {
     override var allowsVibrancy: Bool {
         return true
     }
-
-    func setArrowX(value: CGFloat) {
-        arrowX = value
-        setNeedsDisplay(bounds)
-    }
 }