Display MASP TX details in the confirmation popup

[mateuszjasiuk]

Details to display:

• General Tx props (wrapper Tx, like all other Tx, fees, fee token, etc.)
• Commitments
  • Sources
    • owner
    • token
    • amount
  • Targets
    • owner
    • token
    • amount
• Shielded section hash (we should probably encode this as a string on Details, probably hex)

TODO What is left? We are currently displaying the above ^ for Shielding, confirming the other MASP tx...

List of Txs overview should indicate what type of shielded transfer (if it doesn't already, should be tested and confirmed to do the following):

• Shielding (Transparent -> Shielded)
• Shielded (Shielded -> Shielded)
• Unshielding (Shielded -> Transparent)

NOTE It is already set up to do this, so this issue should primarily be about the Tx Data view, and what can be decoded from the submitted Tx to display.