[ACS-5898] prevent custom task filters from always sending due after date

[g-jaskowski]

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• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation
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What is the current behaviour? (You can also link to an open issue here)
https://alfresco.atlassian.net/browse/ACS-5898

• setDueAfterFilter with moment library always sent Invalid Date, when Due After Filter parameter was null or initialized with empty quotes, after change to date-fns, the date in proper format was always sent, even with empty filter field, which resulted in not listing tasks without due date
• Custom filters form parameters were initialized with empty brackets, which resulted in wrong query parameters before clicking reset button or updating every parameter in form

What is the new behaviour?

• Custom task filters query does not include due after date when corresponding filter is empty
• Form parameters are not initialized with any value

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[sonarcloud]

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