Zap Desktop 0.3.1 Beta

### Bug Fixes * **wallet:** display correct amount on send button ([bb7328d](https://github.com/LN-Zap/zap-desktop/commit/bb7328d)) * **wallet:** fix lightning/lndconnect links ([095c62b](https://github.com/LN-Zap/zap-desktop/commit/095c62b)) * **app:** ensure full app shutdown on quit ([98e1797](https://github.com/LN-Zap/zap-desktop/commit/98e1797)), closes [#1156](https://github.com/LN-Zap/zap-desktop/issues/1156)