Bug fix: confirmation and reminder templates were sometimes not saving if there was an "&" in patient form placeholders

This was a bit of a weird one! Occasionally, some folks were finding that if they were creating or editing a confirmation or reminder template adding a placeholder for a patient form, where the title included an ampersand (the & symbol)—so, something like this:

{{PatientForm.New Patient Form & Health Screening Questionnaire}}

The template wouldn’t save, and would show an error message that said “invalid form placeholder”. Even though it was ultimately “fixable” by removing and then re-adding those placeholders, it was still annoying to have the error there in the first place—so this has now been fixed!