Format text left pin named from same text with different case.

Format text have an artifact when pin name has changed in terms of character case. It leaves previous pin.

1) Create a format text node
2) Type

{abc} def

3) Notice format text creates one input pin named "abc"
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4) Change text to

{ABC} def

5) Notice format text creates new input pin named "ABC" leaving "abc" pin.
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Expected) previous pin "abc" is removed.