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CiviDiscount ExtensionNEEDED* Enhance UI with an "apply discount" button that updates displayed prices on any forms + basically you want to emulate having the discount code sent in via th URL and let the person know if discount code is bogus + it would be nice to do this with ajax but isn't worth much effort.* Create some user documentation + Two types of discounts: automatic membership and code-based. + Supports discounted memberships, events, pricesets + Describe automatic member discounts (use random code never given to public) + Show tracking interfaceNICE TO HAVE* Give some control over the placement of the discount code text field on the form.FIXED ALREADY* Fix/check cividiscount_civicrm_buildAmount() for both online and offline forms/cases (event registration): + check multi-participant case well ( currently this needs to be enabled in code )* Fix/check cividiscount_civicrm_buildForm() for both online, offline and renewal forms/cases (memberships): + check multi-step form case well* Check all transaction amounts match amount displayed on forms.* Fix or remove CDM_BAO_Item::copy(). Currently it's just a copy of CDM_BAO_Item::delete().* Adapt for 4.2 priceset structure.* Create menu link for CiviDiscount extension under Administer* Fix cividiscount_civicrm_pre(): + When a contact is deleted, we should also delete their tracking info/usage. + When removing participant (and additional) from events, also delete their tracking info/usage. + When deleting membership record, also delete their tracking info/usage* Fix/check cividiscount_civicrm_postProcess() tracking for all forms/cases: + check we have correct participantID, membershipID, contributionID when it's needed for tracking + check generic generic contribution cases well ( discount is not available for this )* Fix/check discount tracking tabs.* Generally clean up the code and logic.* Carefully review discount verification and applicability: + fix _get_discounted_event_ids(), _get_discounted_priceset_ids(), _get_discounted_membership_ids() to return events/pricesets/memberships only for active code* Enhance UI to show which discount code has been applied.* Fix membership discounts not working from civicrm/contact/view [Submit Credit Card Membership] - CRM-11028.