fix: clearText action is not working as expected without an int value

[Ahmed Ali Ibrahim]

Description

clearText action is expecting a value of type 'int', but got one of type 'Null', while docs say that it's default is to clear all chars.

Steps To Reproduce

1. create a flow
2. press On a non-empty text field
3. clearText: without a value "as docs say!"
4. See error "Expected a value of type 'int', but got one of type 'Null'"

Expected Behavior
flow works smoothly.

Screenshots
from yaml file:

error:

Additional context
docs:

[Jochum van der Ploeg]

Hmm seems for some reason the default value is not being used, will have to look into why that is happening.