Add occupants wrap option

Wrapping for the occupants panel like already exists for the roster
panel. See `/occupants wrap on`.

Regards https://github.com/boothj5/profanity/issues/690

src/config/preferences.c

@@ -1641,6 +1641,7 @@ _get_group(preference_t pref)
         case PREF_HISTORY:
         case PREF_OCCUPANTS:
         case PREF_OCCUPANTS_JID:
+        case PREF_OCCUPANTS_WRAP:
         case PREF_STATUSES:
         case PREF_STATUSES_CONSOLE:
         case PREF_STATUSES_CHAT:
@@ -1788,6 +1789,8 @@ _get_key(preference_t pref)
             return "occupants";
         case PREF_OCCUPANTS_JID:
             return "occupants.jid";
+        case PREF_OCCUPANTS_WRAP:
+            return "occupants.wrap";
         case PREF_MUC_PRIVILEGES:
             return "privileges";
         case PREF_STATUSES:

src/config/preferences.h

@@ -150,6 +150,7 @@ typedef enum {
     PREF_STATUSBAR_ROOM,
     PREF_OMEMO_LOG,
     PREF_OMEMO_POLICY,
+    PREF_OCCUPANTS_WRAP,
 } preference_t;
 
 typedef struct prof_alias_t {

src/config/theme.c

@@ -388,6 +388,7 @@ _load_preferences(void)
     _set_boolean_preference("resource.message", PREF_RESOURCE_MESSAGE);
     _set_boolean_preference("occupants", PREF_OCCUPANTS);
     _set_boolean_preference("occupants.jid", PREF_OCCUPANTS_JID);
+    _set_boolean_preference("occupants.wrap", PREF_OCCUPANTS_WRAP);
     _set_boolean_preference("roster", PREF_ROSTER);
     _set_boolean_preference("roster.offline", PREF_ROSTER_OFFLINE);
     _set_boolean_preference("roster.resource", PREF_ROSTER_RESOURCE);