Fix posts and rework graphql errors

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

priv/gettext/ar/LC_MESSAGES/default.po

@@ -1300,7 +1300,7 @@ msgstr "لقد قمتَ بتقديم طلب للمشاركة في فعالية %
 msgid "Your participation to event %{title} has been confirmed"
 msgstr ""
 
-#, elixir-format, fuzzy
+#, elixir-format
 #: lib/web/templates/email/report.html.eex:41
 msgid "<b>%{reporter}</b> reported the following content."
 msgstr ""
@@ -1325,7 +1325,17 @@ msgstr ""
 msgid "Profile reported"
 msgstr ""
 
-#, elixir-format, fuzzy
+#, elixir-format
 #: lib/web/templates/email/event_participation_confirmed.html.eex:45
 msgid "You have now confirmed your participation. Update your calendar, because you're on the guest list now!"
 msgstr ""
+
+#, elixir-format
+#: lib/mobilizon/posts/post.ex:91
+msgid "A text is required for the post"
+msgstr ""
+
+#, elixir-format
+#: lib/mobilizon/posts/post.ex:90
+msgid "A title is required for the post"
+msgstr ""