[Regression] When a validator is used and EchoMode::Password is used, the input gets cleared when the character count exceeds the validator's maximum count

This is regression from a commit to:
https://bugreports.qt-project.org/browse/QTBUG-14226
https://codereview.qt-project.org/#change,15185

Steps to reproduce:
1) execute the attached application
2) start inputting to the top most TextInput
3) Type more than 10 characters

Expected result:
One shouldn't be able to input any characters.

Actual result:
Inputed text disappears.