FIO-9144 Fix cursor jump in number component

[blakekrammes]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-9144

Description

What changed?

There's a function called restoreCaretPosition in Component.js that restores the position of the input caret after a refresh. However, in this case, it was not taking the input value's delimiters into account. It might have to do with the time it takes to update the input mask. This PR changes restoreCaretPosition to use the length of the input value instead of root.currentSelection so that delimiters are included in the setSelection() call.

Why have you chosen this solution?

The input value was already within the scope of the function; this solution doesn't mutate root.currentSelection.

Breaking Changes / Backwards Compatibility

n/a

Dependencies

n/a

How has this PR been tested?

Added test for number component that asserts the correct input selection start (caret/cursor) position after calling restoreCaretPosition on it.

Checklist:

• I have completed the above PR template
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended) (singular test)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above