1.6.3

### New feature: * Point of Sale: Add discount option for Keypad view (#3991) @bolatovumar ### Bug fixes: * When a payjoin label was applied, coin selection filter would not work (#3986) @Kukks * When a payjoin happened with a receive address wallet, the payjoin label was not applied (#3986) @Kukks * Crowdfund: Show free when invoice is fixed and 0 amount in apps (#3994) @Kukks * Crowdfund: Animations on crowdfund not enabled broke JS (#3994) @Kukks * Crowdfund: Perk expansion in crowdfund was broken (#3994) @Kukks * Redirect instead of show 404 on 0 amount invoices (#3904) @Kukks ### Improvements: * A few design brush up @dennisreimann @dstrukt * Coin Selection: Fix responsive display (#3992, #3985) @dennisreimann * Point of Sale: In the receipt, the Order Id is now a link pointing to the point of sale (#3995) @Kukks