Adds documentation for uhc settings

medic/cht-core#4758
medic/cht-core#4752

configuration/app-settings.md

@@ -4,10 +4,13 @@ Much of the configuration of the app is stored in the database in a document wit
 
 For more details on what you can use in settings, check out the [superset of supported settings](https://github.com/medic/medic-webapp/blob/master/config/standard/app_settings.json).
 
-### Optional Settings (^3.1)
+### Optional Settings
 
 The following settings do not need to be specified. They should only be defined when the default implementation needs to be changed.
 
-| Setting              | Default | Allowed Values      | Description |
-|----------------------|---------|---------------------|-------------|
-|phone_validation      | full    | full<br/>partial<br/>none | <b>full</b> - full validation of a phone number for a region using length and prefix information.<br/><b>partial</b> - quickly guesses whether a number is a possible phone number by using only the length information, much faster than a full validation.<br/><b>none</b> - allows almost any values but still fails for any phone that contains a-z chars. |
+| Setting              | Description | Default | Version |
+|----------------------|---------|---------|---------|
+| phone_validation     | <ul><li>"full": full validation of a phone number for a region using length and prefix information.</li><li>"partial": quickly guesses whether a number is a possible phone number by using only the length information, much faster than a full validation.</li><li>"none": allows almost any values but still fails for any phone that contains a-z chars.</li></ul> | "full" | 3.1.0   |
+| uhc.contacts_default_sort | <ul><li>"alpha": Sort contacts alphanumerically</li><li>"last_visited_date": sort contacts by the date they were most recently visited.</li></ul> | "alpha" | 2.18.0 | 
+| uhc.visit_count.month_start_date | The date of each month when the visit count is reset to 0. | 1 |2.18.0 | 
+| uhc.visit_count.visit_count_goal | The monthly visit count goal. | 0 | 2.18.0 |