Minor UI changes

app/src/main/java/org/isoron/uhabits/helpers/ListHabitsHelper.java

@@ -115,7 +115,7 @@ public class ListHabitsHelper
 
         ring.setColor(activeColor);
         ring.setPercentage(percentage);
-        ring.setPrecision(0.2f);
+        ring.setPrecision(1.0f / 16);
     }
 
     public void updateCheckmark(int activeColor, TextView tvCheck, int check)

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

@@ -132,7 +132,6 @@
                         android:id="@+id/scoreRing"
                         android:layout_width="30dp"
                         android:layout_height="30dp"
-                        android:layout_margin="10dp"
                         android:layout_gravity="center"
                         habit:percentage="0"
                         habit:textSize="12"

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

@@ -99,7 +99,7 @@
         <item name="lowContrastTextColor">@color/grey_800</item>
 
         <item name="highContrastReverseTextColor">@color/grey_900</item>
-        <item name="mediumContrastReverseTextColor">@color/grey_700</item>
+        <item name="mediumContrastReverseTextColor">@color/grey_750</item>
         <item name="lowContrastReverseTextColor">@color/grey_300</item>
 
         <item name="iconAdd">@drawable/ic_action_add_dark</item>