Show open icon for tracking links

Add the open icon to parsed data values that open an external
link so tracking numbers visibly indicate that tapping them opens
the tracking website.

app/src/main/kotlin/de/markusfisch/android/binaryeye/activity/DecodeActivity.kt

@@ -660,6 +660,15 @@ class DecodeActivity : AbstractBaseActivity() {
 					)
 				)
 				this.text = text
+				if (item.link != null) {
+					setCompoundDrawablesWithIntrinsicBounds(
+						0,
+						0,
+						R.drawable.ic_action_open,
+						0
+					)
+					compoundDrawablePadding = spaceBetween / 2
+				}
 			}
 
 			val alpha = if (dimmed) 0.5f else 1f