Update i18n source file

Author: silvanocerza

Diff for: i18n/en.json

@@ -180,8 +180,10 @@
             "sketchbook": "Sketchbook",
             "upload": "Upload",
             "uploadUsingProgrammer": "Upload Using Programmer",
+            "userFieldsNotFoundError": "Can't find user fields for connected board",
             "doneUploading": "Done uploading.",
             "couldNotConnectToSerial": "Could not reconnect to serial port. {0}",
+            "configureAndUpload": "Configure And Upload",
             "verifyOrCompile": "Verify/Compile",
             "exportBinary": "Export Compiled Binary",
             "verify": "Verify",