Profile importing now checks if it's the right file type

Contributes to CURA-936

plugins/LegacyProfileReader/LegacyProfileReader.py

@@ -63,6 +63,8 @@ class LegacyProfileReader(ProfileReader):
     #   file could not be read or didn't contain a valid profile, \code None
     #   \endcode is returned.
     def read(self, file_name):
+        if file_name.split(".")[-1] != "ini":
+            return None
         Logger.log("i", "Importing legacy profile from file " + file_name + ".")
         profile = Profile(machine_manager = Application.getInstance().getMachineManager(), read_only = False) #Create an empty profile.