Some more bugs fixed.
macOS builds are available now too. Check the 4.0.0 changelog for the macOS specific new features.
v4.0.3 changelog:

• BUGFIX: Add height padding to the transfer list icons. Closes #7951. (sledgehammer999)
• BUGFIX: Allow to drag-n-drop URLs into mainwindow to initiate download. (Chocobo1)
• BUGFIX: Fix crash when fitlering search results. Stable sorting is removed. Closes #7952.(Chocobo1)
• WEBUI: Fix missing qbt logo on login page in webUI. Closes #7953. (Chocobo1)
• WEBUI: Add check to avoid type error after logout. (Chocobo1)
• WEBUI: Use POST for logout command. This is to avoid browser being smart to prefetch the link then logging out the user. (Chocobo1)
• WEBUI: Fix WebUI is not reachable via IPv6. (glassez)
• WINDOWS: Disable the "?" help button in all dialogs on Windows. Closes #7365. Requires Qt 5.10. (Chocobo1)