* Histograms: Add Lightning data and API endpoints
Ported over from the mobile-working-branch.
Adds histogram data for Lightning and exposes the wallet/lightning histogram data via the API. It also add a dashboard graph for the Lightning balance.
Caveat: The Lightning histogram is calculated by using the current channel balance and going backwards through as much invoices and transactions as we have. The "start" of the LN graph data might not be accurate though. That's because we don't track (and not even have) the LN onchain data. It is calculated by using the current channel balance and going backwards through as much invoices and transactions as we have. So the historic graph data for LN is basically a best effort of trying to reconstruct it with what we have: The LN channel transactions.
* More timeframes
* Refactoring: Remove redundant WalletHistogram types
* Remove store property from dashboard tile view models
* JS error fixes
* Add dashboard and chart basics
* More widgets
* Make widgets responsive
* Layout dashboard
* Prepare ExplorerClient
* Switch to Chartist
* Dynamic data for store numbers and recent transactions tiles
* Dynamic data for recent invoices tile
* Improvements
* Plug NBXPlorer DB
* Properly filter by code
* Reorder cheat mode button
* AJAX update for graph data
* Fix create invoice button
* Retry connection on transient issues
* App Top Items stats
* Design updates
* App Sales stats
* Add points for weekly histogram, set last point to current balance
Co-authored-by: nicolas.dorier <nicolas.dorier@gmail.com>
