Do not trim leading and trailing whitespace for signature in NeetoDesk

[sagaranadkat]

Problem as per https://github.com/neetozone/neeto-desk-web/issues/23147#issuecomment-3714328764

Solutions as suggested by Joseph https://github.com/neetozone/neeto-desk-web/issues/23147#issuecomment-3686826701

We should stop trimming leading and trailing whitespace from NeetoDesk signature. Currently, the preview doesn't match the actual output, which is confusing. Keeping the whitespace ensures the output is predictable and prevents Oliver from trying to 'fix' it by adding extra spaces manually.

[josephmathew900]

@philson-philip _a