Improve accuracy of Collection RP Value

[s-coimbra21]

Description

Currently, RP values for skins are obtained by querying the hextech crafting system and filled in manually when data for a specific skin is not available. In order to reflect the user's RP spent more accurately, it should be possible to specify how a skin was obtained (hextech crafting, gift, sale) and save this in the user's local profile.

Criteria

• Allow switching between Total RP Value and RP Spent
• Read RP paid for each skin from user's purchase history
• Differentiate between gifted and crafted skins (rather than just showing 0RP)
• Allow user to fill in the discount %/if it was gifted/crafted manually
• Add a new screen displaying all current overrides (both manual and obtained from API)