Add title to 'add' dialog for 'Groups' entity

To improve translation quality the title of 'Add' dialog should be
specified explicitly in the spec and should be an entire sentence.

Fixes: https://pagure.io/freeipa/issue/7707
Reviewed-By: Serhii Tsymbaliuk <stsymbal@redhat.com>

install/ui/src/freeipa/group.js

@@ -185,6 +185,7 @@ return {
     ],
     standard_association_facets: true,
     adder_dialog: {
+        title: '@i18n:objects.group.add',
         $factory: IPA.group_adder_dialog,
         fields: [
             'cn',

install/ui/src/freeipa/hostgroup.js

@@ -104,6 +104,7 @@ return {
     ],
     standard_association_facets: true,
     adder_dialog: {
+        title: '@i18n:objects.hostgroup.add',
         fields: [
             'cn',
             {

install/ui/src/freeipa/netgroup.js

@@ -71,6 +71,7 @@ var spec = {
     ],
     standard_association_facets: true,
     adder_dialog: {
+        title: '@i18n:objects.netgroup.add',
         fields: [
             'cn',
             {

ipaserver/plugins/internal.py

@@ -698,6 +698,7 @@ class i18n_messages(Command):
                 "set": _("Set Domain Level"),
             },
             "group": {
+                "add": _("Add user group"),
                 "details": _("Group Settings"),
                 "external": _("External"),
                 "groups": _("Groups"),
@@ -843,6 +844,7 @@ class i18n_messages(Command):
                 "unprovisioned": _("Host unprovisioned"),
             },
             "hostgroup": {
+                "add": _("Add host group"),
                 "host_group": _("Host Groups"),
                 "identity": _("Host Group Settings"),
                 "remove": _("Remove host groups"),
@@ -902,6 +904,7 @@ class i18n_messages(Command):
                 "identity": _("Kerberos Ticket Policy"),
             },
             "netgroup": {
+                "add": _("Add netgroup"),
                 "any_host": _("Any Host"),
                 "anyone": _("Anyone"),
                 "external": _("External"),