Mask doesn't handle pasting values that make the value too long for the mask

[bloodyowl]

behaviour

In the credit card example:

• Type 123456789012
• Write 12345 somewhere else, copy it
• Paste after the 2 already in the field
• Value isn't updated

expected

• Value should be updated

Not sure what the behaviour should be exactly, I'd intuitively say that appending pastedValue.slice(0, maxLength - currentValueLength) to the value should work