Changes email frequency field to number type

[robwent]

Q	A
Bug fix?	Y
New feature?	N
Related user documentation PR URL
Related developer documentation PR URL
Issues addressed (#s or URLs)	#4882
BC breaks?	N
Deprecations?	N

Description:

The current frequency preference field is a text field and should be a number

Steps to reproduce the bug:

1. Enable user preferences and frequency options in email configuration
2. Check the preferences page and the field type will be text

Steps to test this PR:

1. After the update, check the frequency field type, it should be a number field

[Hadamcik]

GitHub instructions to test PR did not work. If needed use:
git pull https://github.com/robwent/mautic.git '#4882'

However it doesn't work for me. Field is still type of text.

Just to be sure - I checked out Configuration -> Email settings -> Default Frequency Rule

[alanhartless]

@dreiser Go to Mautic configuration, Email Settings, and make sure all the Yes/No toggles at the bottom are set to Yes. Add yourself as a contact and to a segment. Create a segment email using the default blank template. Send the segment email and open it. Copy the unsubscribe URL into guest session which should take you to the preference center page for the contact. Check the frequency rule number input on that page.

[escopecz]

Works as described 👍