Added check for isModuleOutputEnabled('Mage_Review') in customer's backend page

[eneiasramos]

Added validation for module Mage_Review in customer management ...

[ADDISON74]

Any steps to reproduce the issue?

[eneiasramos]

@ADDISON74

The module Mage_Review is disabled. However, the link to it still appears. And when I click on it it generates an error.

[ADDISON74]

VARIANT 1
In order to disable the Review module I edited the file /app/etc/modules/Mage_Review.xml, but the Rating module depends on it, so I disable it too.

If I am accessing a customer account in the Backend, the [Product Reviews] tab is there. If I click on it I am seeing the fatal error bellow

VARIANT 2
Disabling the Review module output in the Backend > System > Configuration > Advanced, in the customer account page the [Product Reviews] tab is there and loads all reviews.

Both variants are producing wrong behaviors related to the Review module.

Now lets test both variants with this PR applied

Variant 1: Disabling the module by editing the xml file the [Product Reviews] tab doesn't appear anymore. This PR fixes the issue.

Variant 2: Disabling the output of the module, the [Product Reviews] tab should not be visible in the customer account, but it is still there. If I am not wrong this needs a fix too.

[fballiano]

thanks to @kiatng suggestion it works for all cases now

[ADDISON74]

With the last change both scenarios mention in my post are solved. We can merge it.