Returned full error to browser. (#897)

This is first step of new error handling. UI rework will be done

Co-authored-by: Benjamin Perez <benjamin@bexsoft.net>

restapi/embedded_spec.go

@@ -3786,13 +3786,17 @@ func init() {
     "error": {
       "type": "object",
       "required": [
-        "message"
+        "message",
+        "detailedMessage"
       ],
       "properties": {
         "code": {
           "type": "integer",
           "format": "int32"
         },
+        "detailedMessage": {
+          "type": "string"
+        },
         "message": {
           "type": "string"
         }
@@ -9292,13 +9296,17 @@ func init() {
     "error": {
       "type": "object",
       "required": [
-        "message"
+        "message",
+        "detailedMessage"
       ],
       "properties": {
         "code": {
           "type": "integer",
           "format": "int32"
         },
+        "detailedMessage": {
+          "type": "string"
+        },
         "message": {
           "type": "string"
         }

restapi/error.go

@@ -166,7 +166,7 @@ func prepareError(err ...error) *models.Error {
 			errorMessage = err[0].Error()
 		}
 	}
-	return &models.Error{Code: errorCode, Message: swag.String(errorMessage)}
+	return &models.Error{Code: errorCode, Message: swag.String(errorMessage), DetailedMessage: swag.String(err[0].Error())}
 }
 
 func getFrame(skipFrames int) runtime.Frame {