Feature/synthesis polishing

[eugene-doobu]

This pull request includes several changes to improve the synthesis functionality and UI interactions in the nekoyume project. The most important changes include adding equality operators to the SynthesizeModel class, refactoring the SynthesisInventory class, and enhancing the SynthesisRegistrationPopup class to handle model updates and clear actions more effectively.

Improvements to SynthesizeModel class:

• Added == and != operators to the SynthesizeModel class to allow for easy comparison of instances based on Grade and ItemSubType.

Refactoring of SynthesisInventory class:

• Removed the _disposables list and refactored the OnEnable and OnDisable methods to update the inventory directly. [1] [2]

Enhancements to SynthesisRegistrationPopup class:

• Added a HasModel method to check if the popup currently holds a specific model.
• Modified the Show method to check for the same model and update the inventory if necessary. [1] [2]
• Added a Clear method to reset the registration state and update the inventory.
• Improved the ShowItemTooltip method to handle active tooltips more gracefully.

Other UI updates:

• Updated the Synthesis class to use the new HasModel method in the OnClickGradeItem method to prevent redundant popup displays.
• Added a call to clear the SynthesisRegistrationPopup in the ClearScrollData method of the SynthesisModule class.