Minor improvements first-login.md (#31)

Revisions per feedback. First PR test with Gramps Web docs.To get an idea of how documentation changes roll into Demo and Releases

docs/user-guide/first-login.md

@@ -1,7 +1,7 @@
-When logging in to Gramps Web for the first time, a form will be displayed requiring the user to select a language for the frontend and a home person.
+When logging in to Gramps Web for the first time, a Preferences form (labeled User Settings) will be displayed requiring the user to select a language for the frontend and a [Home Person](https://www.gramps-project.org/wiki/index.php/Gramps_Glossary#home_person). The Home Person selection can also be changed from the Home Page of the website.
 
-This home person does not have to coincide with the home person in Gramps desktop – it is a personal setting for every user of Gramps Web. The home person is used e.g. for the initial view of the family tree. A typical choice would be for a user to select themselves as home person.
+The Home Person for a user of a Gramps Web website does not have to be the same person that the site's owner chose in Gramps for Desktops — it is a personal setting that can be different for every user of Gramps Web. The home person is used for the initial view of the family tree and the starting point for most Reports. A typical choice would be for a user to select themselves as Home Person. When collaborating with another member of a Tree, those users might want to set the common ancestor as the Home Person. This ensures a common point of reference for the distant relationships.
 
-To select a person as home person, start typing in the text field and a drop-down list with matches will appear.
+To select a person as Home Person, start typing a Given or Family Name in the text field and a drop-down list with matches will appear.
 
-The language and home person settings are stored in the browser's local storage, so they will persist on a given device.
+The language and Home Person settings are stored in the browser's local storage, so they will persist on a given device.