Fix specific version within extra node module

[hinrichd]

Thank you for making node-red ⚙ better

This is a small fix up on issue --> #318 So I do not open an new issue.

Split and rsplit will not work properly in some conditions, even the array index -1 will be empty in some common situations. There for i have changed the behaviour of splitting the module name and version for the following common cases and avoid multi /,@ matches:

NODE-RED-NODE-MYSQL [email protected] NODE-RED-NODE-MYSQL/ @FLOWFUSE/NODE-RED-DASHBOARD @FLOWFUSE/NODE-RED-DASHBOARD/ @FLOWFUSE/[email protected]

Regards

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