DateRangePicker is not showing correct end date properly if i use singlemonthOnly="true"

[Pachiyappan]

Environment

• Package version(s): 1.23.0
• Browser and OS versions: Chrome latest, OSX.

Steps to reproduce

1. open DateRangeInput doc page on http://blueprintjs.com/docs/#datetime/daterangeinput.
2. disable "Constrain calendar to contiguous months" option and select the "single month only".
3. Enter dates similar to following: "05/25/2019" -> "08/15/2019" (MM/DD/YYYY format used). You could also use the popover to choose the dates. Open the start Date again, see the date that will be the correct(show this month - 05/25/2019) . Then select the end Date, see the Date, that is also will show the start date only (showing this month - 05/25/2019).

Actual behavior

Start date only showing if i select start and end date on the single month only behaviour.

Expected behavior

When i select end date that should show end month(08/15/2019).

Possible solution

Set "initialMonth" as the DateRangePicker value from the focused input field, if the DateRange value exist otherwise set current month.