add the color customization button in settings

app/src/main/AndroidManifest.xml

@@ -44,6 +44,11 @@
             android:label="@string/about"
             android:parentActivityName=".activities.MainActivity"/>
 
+        <activity
+            android:name="com.simplemobiletools.commons.activities.CustomizationActivity"
+            android:label="@string/customize_colors"
+            android:parentActivityName=".activities.SettingsActivity"/>
+
         <activity
             android:name=".activities.DayActivity"
             android:label="@string/details"

app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt

@@ -27,6 +27,7 @@ class SettingsActivity : SimpleActivity() {
     override fun onResume() {
         super.onResume()
 
+        setupCustomizeColors()
         setupSundayFirst()
         setupWeekNumbers()
         setupVibrate()
@@ -35,6 +36,12 @@ class SettingsActivity : SimpleActivity() {
         updateTextColors(settings_holder)
     }
 
+    private fun setupCustomizeColors() {
+        settings_customize_colors_holder.setOnClickListener {
+            startCustomizationActivity()
+        }
+    }
+
     private fun setupSundayFirst() {
         settings_sunday_first.isChecked = config.isSundayFirst
         settings_sunday_first_holder.setOnClickListener {

app/src/main/res/layout/activity_settings.xml

@@ -11,6 +11,25 @@
         android:layout_height="wrap_content"
         android:orientation="vertical">
 
+        <RelativeLayout
+            android:id="@+id/settings_customize_colors_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:padding="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MyTextView
+                android:id="@+id/settings_customize_colors_label"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/customize_colors"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_sunday_first_holder"
             android:layout_width="match_parent"