Release 3.8.0devNightly1-571bbaf (r3.8.0devNightly1)

• Internal: Enable signing of macOS binaries via build script (#1856).
  (contributed by @emlynmac)

• Documentation: Update typo on links in compiling.md file (#1824).
  (contributed by @jujudusud)

• CLI: Re-order and refactor help for client/server validation (#1896).
  (contributed by @pljones)

• CLI: Jamulus now shows a link to the Website for translated content (#1759).
  (contributed by @henkdegroot)

• Client: JACK support on Windows has been improved (#1718).
  (contributed by @jujudusud, @henkdegroot)

• Client: Rewrote multiple error messages to improve UX (#1568, #1732).
  (contributed by @ann0see)

• Client: Add custom directory servers to Connect Dialog (#1869, #1894).
  (contributed by @jp8)

• Server: A single click on the server application in the systemtray now opens the Jamulus Server main window (#1722, #1731).
  (contributed by @henkdegroot)

• Server: Jam Recorder's internal locking and initiatlization code has been made more robust (#1826).
  (contributed by @cdmahoney)

• Server: The list of servers registered on a directory can now be saved during directory restart. Use the new
  --directoryfile CLI option to use this feature. (#1867)
  (contributed by @pljones)

• Android: Add close button on Android to enhance UX (#1763, #1876).
  (contributed by @ngocdh)

• MacOS: Keyboard shortcuts now also work on macOS (#1726, #1873).
  (contributed by @henkdegroot)

• Bug Fix: Mute myself has been made more consistent (#1838).
  (contributed by @ngocdh)

• Bug Fix: Fix ampersand not being shown correctly on mixer (#1886, #1893).
  (contributed by @ann0see)