Change accent color, minor UI changes

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

@@ -146,6 +146,8 @@
                     android:id="@+id/price_range_bar"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
+                    android:layout_marginLeft="10dp"
+                    android:layout_marginRight="10dp"
                     rsb:absoluteMaxValue="300"
                     rsb:absoluteMinValue="0"
                     rsb:textAboveThumbsColor="#000000"/>

app/src/main/res/values/colors.xml

@@ -2,5 +2,5 @@
 <resources>
     <color name="colorPrimary">#3f51b5</color>
     <color name="colorPrimaryDark">#303F9F</color>
-    <color name="colorAccent">#FF4081</color>
+    <color name="colorAccent">#3100FF</color>
 </resources>