Added support for Müller Licht tint remote.

[m-kurtenacker]

This adds support for the six scene buttons found on MLIs "ZBT-Remote-ALL-RGBW".

The remote normally issues a write_attributes command if one of those buttons is pressed. The quirk translates this to an update on a scene cluster.

[Adminiuga]

Lgtm if checks pass

[codecov-commenter]

Codecov Report

Merging #1074 (0d78193) into dev (b5d29f5) will decrease coverage by 0.11%.
The diff coverage is 63.88%.

@@            Coverage Diff             @@
##              dev    #1074      +/-   ##
==========================================
- Coverage   81.19%   81.07%   -0.12%     
==========================================
  Files         196      197       +1     
  Lines        5190     5226      +36     
==========================================
+ Hits         4214     4237      +23     
- Misses        976      989      +13     

Impacted Files	Coverage Δ
zhaquirks/mli/tint.py	63.88% <63.88%> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 1351316446

• 23 of 36 (63.89%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 81.075%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
zhaquirks/mli/tint.py	23	36	63.89%

Totals
Change from base Build 1349092155:	-0.1%
Covered Lines:	4237
Relevant Lines:	5226

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💛 - Coveralls