Improve DatePicker and TimePicker components

[AbhayVAshokan]

References:

1. https://github.com/bigbinary/neeto-engineering-web/issues/630#issuecomment-2011950656
2. https://github.com/bigbinary/neeto-engineering-web/issues/630#issuecomment-2009799938

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Action Items

• The default increments for time picker should be 15 min/seconds.
• Improvements to the existing datepicker and time picker: https://github.com/bigbinary/neeto-engineering-web/issues/630#issuecomment-2009799938

1D _t engineer-needed _t

[josephmathew900]

@gaagul _a