I have installed latest copy of joomla-cms in my local and tested "Number" form field, and before patch this field is working fine for me. It is allowing me to enter integer only.
Tested in Joomla! 3.7.0-rc1

I have tested this item ? unsuccessfully on 1702a59

With and -out got:

Click on Select an Option > no reaction.

Before PR: I have changed text field of Article title to Number and tested, Number field is not allowing me to enter text. Attached screen dump for reference. Tested with Joomla! 3.7.0-rc1 — © 2017.

@franz-wohlkoenig what did you add as values to the settings?

@zero-24 Settings from Plugin:

@franz-wohlkoenig this PR is just about the fields that you are not longer allowed to put in ther any chars.

The broken integer field is another issue :(

@franz-wohlkoenig i have just tested it and it is working good here. Please try with the settings in the field itself and not with the settings from the plugin.

I have tested this item ✅ successfully on 1702a59

Tested with settings in the Field itself (not with Settings from Plugin).

@franz-wohlkoenig just to be sure can you save the current setting of the plugin and check if the dropdown is working than (even without a per field setting)? As it works good here. If not please open a new issue so we can keep tracke on that ?

@zero-24 works: first and second new Integer-Field shows Plugin-Setting as expected.

Thanks for checking ?

as i don't know Reason why its now working (PR ist not apllied) i'm ...

as i don't know Reason why its now working (PR ist not applied) i'm ...

The reason it don't work in the first place (without saving the plugin) was that the values are not saved to the database ?

I have tested this item ✅ successfully on 1702a59

Name in Typ of Field: Integer(integer) it is not optimally.
We can enter integer and also we can enter numbers with comma for example: 3,1

But it is better as before the patch.

RTC