Wrapped in an if-clause and bound regex pattern is modified and if-clause property is toggled

[notmessenger]

The resolution of #161 introduced this bug. When {{ef-element-error}} is not wrapped in an {{#if}} all works as expected. When it is wrapped in an {{#if}} and

• If condition is initially false, not displaying this component
• The if condition is toggled to true
• The bound error pattern of this component is changed to one that still matches.
• The bound error pattern of this component is changed to one that does not match.
• The default instance of this component will display its content because there are no pattern matches in any of the other instances.

but

• If condition is initially false, not displaying this component
• The if condition is toggled to true
• The bound error pattern of this component is changed to one that still matches.
• The if condition is toggled to false
• The if condition is toggled to true
• The bound error pattern of this component is changed to one that does not match.
• The default instance of this component will NOT display its content even though it should because there are no pattern matches in any of the other instances.