Changed habit type selection to dropdown instead of popup message (#498)

android/uhabits-android/src/main/res/menu/list_habits.xml

@@ -18,15 +18,28 @@
   -->
 
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
-      xmlns:app="http://schemas.android.com/apk/res-auto"
-      xmlns:tools="http://schemas.android.com/tools"
-      tools:context=".MainActivity">
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context=".MainActivity">
 
     <item
         android:id="@+id/actionAdd"
         android:icon="?iconAdd"
         android:title="@string/add_habit"
-        app:showAsAction="always"/>
+        app:showAsAction="always">
+
+        <menu android:id="@+id/createHabitMenu">
+            <item
+                android:id="@+id/actionCreateBooleanHabit"
+                android:enabled="true"
+                android:title="@string/yes_or_no"/>
+
+            <item
+                android:id="@+id/actionCreateNumeralHabit"
+                android:enabled="true"
+                android:title="@string/number"/>
+        </menu>
+    </item>
 
     <item
         android:id="@+id/action_filter"

android/uhabits-android/src/main/res/values/strings.xml

@@ -184,6 +184,10 @@
 
     <string name="total">Total</string>
 
+    <!-- Different types of habits -->
+    <string name="yes_or_no">Yes or No</string>
+    <string name="number">Number</string>
+
     <!-- Middle part of the sentence '1 time in xx days' -->
     <string name="time_every">time in</string>
 

android/uhabits-android/src/main/res/xml/preferences.xml

@@ -153,11 +153,6 @@
             android:key="pref_developer"
             android:title="Enable developer mode"/>
 
-        <CheckBoxPreference
-            android:defaultValue="false"
-            android:key="pref_feature_numerical_habits"
-            android:title="Enable numerical habits"/>
-
         <CheckBoxPreference
             android:defaultValue="false"
             android:key="pref_feature_sync"