Update to 2.4.1

Changelog:
2.4.1 (2019-04-12)
=========================

- Fix database deletion when using unsafe saves to a different file system [#2889]
- Fix opening databases with legacy key files that contain '/' [#2872]
- Fix opening database files from the command line [#2919]
- Fix crash when editing master key [#2836]
- Fix multiple issues with apply button behavior [#2947]
- Fix issues on application startup (tab order, --pw-stdin, etc.) [#2830]
- Fix building without WITH_XC_KEESHARE
- Fix reference entry coloring on macOS dark mode [#2984]
- Hide window when performing entry auto-type on macOS [#2969]
- Improve UX of update checker; reduce checks to every 7 days [#2968]
- KeeShare improvements [#2946, #2978, #2824]
- Re-enable Ctrl+C to copy password from search box [#2947]
- Add KeePassXC-Browser integration for Brave browser [#2933]
- SSH Agent: Re-Add keys on database unlock [#2982]
- SSH Agent: Only remove keys on app exit if they are removed on lock [#2985]
- CLI: Add --no-password option [#2708]
- CLI: Improve database extraction to XML [#2698]
- CLI: Don't call mandb on build [#2774]
- CLI: Add debug info [#2714]
- Improve support for Snap theming [#2832]
- Add support for building on Haiku OS [#2859]
- Ctrl+PgDn now goes to the next tab and Ctrl+PgUp to the previous
- Fix compiling on GCC 5 / Xenial [#2990]
- Add .gitrev output to tarball for third-party builds [#2970]
- Add WITH_XC_UPDATECHECK compile flag to toggle the update checker [#2968]

(ryoon)