[Resolve #576] Philips Hue Dimmer v2 - Edit trigger_delta; make whitespacing optional.

[TTvanWillegen]

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Proposed change*

Instead of obligatory whitespacing between the key-semicolon and value, make these optional. Same for whitespace between the two last_action parts.

Resolves #576. Instead of action taken as stated in issue (remove whitespace from regex), uses optional whitespace (\s*?)

Checklist*

• [X] I followed sections of the Contribution Guidelines relevant to changes I'm proposing.
• [X] I properly tested proposed changes on my system and confirm that they are working as expected.
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[nomike]

I have come up with exactly the same solution and found this PR when I was about to submit mine.

I have tested it on my setup, it is safe could be merged IMHO.