Adds settings API for getting current network details.
Uses the current network details to display the correct etherscan link in QML (etherscan URL is a setting in the current network settings).
Allow switching to Ropsten by flipping a toggle switch in Profile > Advanced settings.
When switching networks, note that installed stickers will be uninstalled, and recent stickers will be removed. Sticker packs can be reinstalled after login. Purchased sticker packs will not need to be re-purchased, but will need to be re-installed.
Mailserver fleet information will **not** be updated. This can be controlled by a separate (undeveloped yet) setting.
Sticker pack details retreived from contract:
- pack data decoded from contract response
- data contains contentHash which, once decoded, contains an IPFS identifier
- futher pack data in EDN format is downloaded from IPFS
- the EDN info is decoded in to a StickerPack
List of available packs from contract are obtained separately from list of installed contracts (stored as a setting in Status-go).
Sticker market contains dynamic list of sticker packs. The sticker button shown for each pack has all states defined (in the design) for all UI states (ie bought, free, installed, pending, etc)
Add modal popup showing sticker pack details and list of stickers to be un/installed. Contains a "larger" version of the sticker pack button with many differnt UI states defined.
Uninstallation of a sticker pack removes those sticker pack's stickers from the recent sticker list and persists the list
Simplify the view model by including stickers, instead of setting an "activeStickerPackId" property. This allowed for display of sticker pack stickers to be displayed in the modal popup separately from the sticker packs shown in the market.
