refactor: extract graph period label

Author: jvsena42

app/src/main/java/to/bitkit/ext/GraphPeriod.kt

@@ -0,0 +1,13 @@
+package to.bitkit.ext
+
+import androidx.annotation.StringRes
+import to.bitkit.R
+import to.bitkit.data.dto.price.GraphPeriod
+
+@StringRes
+fun GraphPeriod.labelRes(): Int = when (this) {
+    GraphPeriod.ONE_DAY -> R.string.appwidget__price__day
+    GraphPeriod.ONE_WEEK -> R.string.appwidget__price__week
+    GraphPeriod.ONE_MONTH -> R.string.appwidget__price__month
+    GraphPeriod.ONE_YEAR -> R.string.appwidget__price__year
+}