Translate desktop PM deletion confirmation and errors

tools/chatgui/translations/chatgui_en.ts

@@ -2635,5 +2635,17 @@ See log:
         <source>Failed to delete channel.</source>
         <translation>Failed to delete channel.</translation>
     </message>
+    <message>
+        <source>Delete conversation</source>
+        <translation>Delete conversation</translation>
+    </message>
+    <message>
+        <source>Delete the conversation with %1 and its local files? The other person keeps their history.</source>
+        <translation>Delete the conversation with %1 and its local files? The other person keeps their history.</translation>
+    </message>
+    <message>
+        <source>Could not delete the conversation. Please try again.</source>
+        <translation>Could not delete the conversation. Please try again.</translation>
+    </message>
 </context>
 </TS>

tools/chatgui/translations/chatgui_ru.ts

@@ -2644,5 +2644,17 @@ See log:
         <source>Failed to delete channel.</source>
         <translation>Не удалось удалить канал.</translation>
     </message>
+    <message>
+        <source>Delete conversation</source>
+        <translation>Удалить переписку</translation>
+    </message>
+    <message>
+        <source>Delete the conversation with %1 and its local files? The other person keeps their history.</source>
+        <translation>Удалить переписку с %1 и её локальные файлы? У собеседника история сохранится.</translation>
+    </message>
+    <message>
+        <source>Could not delete the conversation. Please try again.</source>
+        <translation>Не удалось удалить переписку. Повторите попытку.</translation>
+    </message>
 </context>
 </TS>