add names to conversation view and set header styles

Change-Id: Ic34b2cea754a5a82224a9fbf158b0126c7e44a5e
diff --git a/client/src/locale/fr/translation.json b/client/src/locale/fr/translation.json
index 332c3d4..936d83d 100644
--- a/client/src/locale/fr/translation.json
+++ b/client/src/locale/fr/translation.json
@@ -1,4 +1,14 @@
 {
+  "conversation_title_one": "{{member0}}",
+  "conversation_title_two": "{{member0}} et {{member1}}",
+  "conversation_title_three": "{{member0}}, {{member1}} et {{member2}}",
+  "conversation_title_four": "{{member0}}, {{member1}}, {{member2}}, +1 autre membre",
+  "conversation_title_more": "{{member01}}, {{member1}}, {{member2}}, +{{excess}} autres membres",
   "message_swarm_created": "Le Swarm a été créé",
-  "message_user_joined": "{{user}} s'est joint"
+  "message_user_joined": "{{user}} s'est joint",
+  "message_input_placeholder_one": "Écrire à {{member0}}",
+  "message_input_placeholder_two": "Écrire à {{member0}} et {{member1}}",
+  "message_input_placeholder_three": "Écrire à {{member0}}, {{member1}} et {{member2}}",
+  "message_input_placeholder_four": "Écrire à {{member0}}, {{member1}}, {{member2}}, +1 autre membre",
+  "message_input_placeholder_more": "Écrire à {{member01}}, {{member1}}, {{member2}}, +{{excess}} autres membres"
 }