fix(opening hours): save unchecked check box

[donni106]

• added hidden field for :open check box, as rails does not render it automatically with the .check_box when passed false as last param (unchecked value)
• cast "false" to boolean in parameters being sent to the server, as this does not happen automatically and produces errors
  • somehow magic happens for check_box value "true" and it is not needed
• updated default check box value to respect to objects value if given

SVA-434

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[codeclimate[bot]]

Code Climate has analyzed commit b813b73c and detected 2 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	1
Style	1

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