Add StartDate Filter button is incorrectly enabled after editing date

Reproduce:

• In the Report Edit mode, open the Start Date Filter modal
• Click in the first date text input field
• Ignore the popover and type an invalid date there
• See that the Add Filter button is correctly disabled
• Click on the second date text input field
• Ignore the popover and type an invalid date there
• Continue ignoring the popover and type a valid date there

Expected:

• The Add Filter button is still disabled as the first date input field still contains an invalid date

Observed:

• The Add Filter button is enabled