Some UI improvements

- Bottom tab now only shows indices of active chat windows unless focused
- Always focus Home screen on startup instead of the last loaded conference
- Conference tab names are no longer prefixed with the conference number
- Home and Contact tab names are now capitalized

src/friendlist.c

@@ -1378,6 +1378,6 @@ ToxWindow *new_friendlist(void)
     }
 
     ret->help = help;
-    strcpy(ret->name, "contacts");
+    strcpy(ret->name, "Contacts");
     return ret;
 }