Core Wallet Community Fund UI Improvement

[hdnsimpson]

• Added a Community Fund tab to the core wallet
• Ability to view and filter proposals and payment request
• Proposals and payment requests can be voted on and created
• Removed the old Community Fund UI

[marcus290]

I've manually tested the UI on regtest for viewing proposals/payment requests in different states, changes in vote numbers and states. I've also checked the display of current proposals/payment requests on mainnet. Looks good to me!

For createproposal / createpaymentrequest UI, I can also confirm there are the same checks as the rpc commands.

I gave some feedback but these have already been addressed in some of the commits after 2ecfdcf.

[red010b37]

Im only part way through - will finish the rest later, all super minor and more code hygiene than anything major

[aguycalled]

everything looks quite good from what i've tested in devnet. i only miss a filter for seeing proposals/prequests in pending state for which I haven't voted yet. this should be the view I see when I click the open community fund button from the new proposals alert dialog.