[DEV] Revert "[DEV] Hide known recipes when the Usable box is checked in the AH. Patch by y1x2"

This reverts commit add35fae0928c34801b8dee551a79221253040f1.

Signed-off-by: Salja <salja8840@gmail.com>
[DEV] Revert "[DEV] Don't do periodic heal ticks if the target is already at max health."

This reverts commit 3ba22c37227633426cdf19f6457ab0286d33e705.

Signed-off-by: Salja <salja8840@gmail.com>
[z2439] Don't do periodic heal ticks if the target is already at max health.

If a target is at maximum health already periodic healing spells should
not tick.

From the healer's point of view this means far less overhealing, improving
their healing performance information.

Fixes cmangos/issues#385.
[z2440] Hide known recipes when the Usable box is checked in the AH.

Fixes cmangos/issues#394.