[BUG] Test cases don't evaluate everything in "MATCH FULL"

[YorikHansen]

Description:
"MATCH FULL" does not work properly, if the tested regex contains a top level | and an other case is partially matched.

Minimal Example:
a|ab with the test case ab (https://regexr.com/8alo5)

Expected Behavior:
As the regex could match the full ab and the test type is all, the test should be successful (as if the entered regex would be ^(?:a|ab)$)

Observed Behavior:
The test fails, as Text.js:326 only checks, if the found match has the right length.

Related Issues:
This bug seems to be related to the optimization mentioned in #513