<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/action_customize"
        android:showAsAction="ifRoom"
        android:title="@string/customize"
        android:icon="@drawable/ic_action_customize"
        android:checkable="true" />

    <item android:id="@+id/menu">

        <item
            android:id="@+id/action_reset"
            android:showAsAction="ifRoom"
            android:icon="@drawable/ic_action_reset"
            android:title="@string/reset" />
        <item
            android:id="@+id/action_open_activities"
            android:showAsAction="ifRoom"
            android:title="@string/open_activities"
            android:checkable="true" />
        <item
            android:id="@+id/action_about"
            android:showAsAction="ifRoom"
            android:icon="@drawable/ic_action_customize"
            android:title="@string/about" />
    </item>
</menu>
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/action_customize"
        android:showAsAction="ifRoom"
        android:title="@string/customize"
        android:icon="@drawable/ic_action_customize" />

    <item android:id="@+id/menu">

        <item
            android:id="@+id/action_reset"
            android:showAsAction="ifRoom"
            android:icon="@drawable/ic_action_reset"
            android:title="@string/reset" />
        <item
            android:id="@+id/action_open_activities"
            android:showAsAction="ifRoom"
            android:title="@string/open_activities"
            android:checkable="true" />
        <item
            android:id="@+id/action_about"
            android:showAsAction="ifRoom"
            android:icon="@drawable/ic_action_customize"
            android:title="@string/about" />
    </item>
</menu>
Remove check from menu item
Remove check from menu item
