Module relies on a string function to remove UI elements

For those who use either of the "Remove core" settings in the Group Forum module, the module uses the strstr function to remove a UI element supplied by the core forum module. See gforum_preprocess_block(). This presents a very slight risk that the feature will conflict with other contributed modules that preprocess the same markup before gforum has a chance to preprocess.

This minor issue probably can't be addressed unless the parent bug in the core forum module is addressed.