Renamed Channel.Description to Channel.Header on the server

model/channel.go

@@ -24,7 +24,7 @@ type Channel struct {
 	Type          string `json:"type"`
 	DisplayName   string `json:"display_name"`
 	Name          string `json:"name"`
-	Description   string `json:"description"`
+	Header        string `json:"header"`
 	LastPostAt    int64  `json:"last_post_at"`
 	TotalMsgCount int64  `json:"total_msg_count"`
 	ExtraUpdateAt int64  `json:"extra_update_at"`
@@ -89,8 +89,8 @@ func (o *Channel) IsValid() *AppError {
 		return NewAppError("Channel.IsValid", "Invalid type", "id="+o.Id)
 	}
 
-	if len(o.Description) > 1024 {
-		return NewAppError("Channel.IsValid", "Invalid description", "id="+o.Id)
+	if len(o.Header) > 1024 {
+		return NewAppError("Channel.IsValid", "Invalid header", "id="+o.Id)
 	}
 
 	if len(o.CreatorId) > 26 {