layout: replace menu icon with utf8 character

The three dot menu icosn looks odd when stretched
due to the dynamic menu feature. Thus replace it
with the hamburger menu character that looks better
when scaled.

app/src/main/java/it/danieleverducci/lunatracker/StatisticsActivity.kt

@@ -149,10 +149,12 @@ class StatisticsActivity :  AppCompatActivity() {
             array[index].y += 1F
         }
 
+        /*
         Log.d(TAG, "values.size: ${values.size}")
         for ((key, value) in values) {
             Log.d(TAG, "key: $key, value.size: ${value.size} ,value: ${value.joinToString { it.y.toLong().toString() }}")
         }
+         */
 
         // make sure legend names are not too long
         fun shorten(notes: String): String {
@@ -794,10 +796,19 @@ class StatisticsActivity :  AppCompatActivity() {
                 val month = dateTime.get(Calendar.MONTH) + 1 // month starts at 0
                 val week = dateTime.get(Calendar.WEEK_OF_YEAR)
                 val day = dateTime.get(Calendar.DAY_OF_MONTH)
+
+                // Dirty hack to get monotone number of weeks
+                // The first week if the year might start in the previous year.
+                val yearFixed = if (month == 12 && week == 1) {
+                    year + 1
+                } else {
+                    year
+                }
+
                 return when (timeRangeSelection) {
-                    TimeRange.DAY -> "$day/$month/$year"
-                    TimeRange.WEEK -> "$week/$year"
-                    TimeRange.MONTH -> "$month/$year"
+                    TimeRange.DAY -> "$day/$month/$yearFixed"
+                    TimeRange.WEEK -> "$week/$yearFixed"
+                    TimeRange.MONTH -> "$month/$yearFixed"
                 }
             }
         }
@@ -914,9 +925,10 @@ class StatisticsActivity :  AppCompatActivity() {
             dateTime.time = Date(seconds * 1000)
             val years = dateTime.get(Calendar.YEAR) - 1970
             val weeks = dateTime.get(Calendar.WEEK_OF_YEAR)
-            val month = dateTime.get(Calendar.MONTH)
-            // dirty hack to get monotone number of weeks
-            if (month == 11 && weeks == 1) {
+            val month = dateTime.get(Calendar.MONTH) + 1 // month starts at 0
+
+            if (month == 12 && weeks == 1) {
+                // The first week if the year might start in the previous year.
                 return 52 * (years + 1) + weeks
             }