Remove menu

It is not quite useful right now, hence, removing it. Options could be
to migrate to native menus on platforms where it is available (such as
macOS) or even just provide a built in "help" showing the available
shortcuts (and making them configurable?).
12 jobs for 196-clickable-links-in-item-titles-in-schedule-view in 13 minutes and 37 seconds (queued for 1 second)
Status Job ID Name Coverage
  Images
manual #57471637
allowed to fail manual
build_image_android
manual #57471634
allowed to fail manual
build_image_ubuntu
manual #57471635
allowed to fail manual
build_image_win32
manual #57471636
allowed to fail manual
build_image_win64
 
  Build
passed #57471644
android_armv7

00:08:36

passed #57471645
android_x86

00:10:33

manual #57471643
macos allowed to fail manual
macos
passed #57471638
ubuntu_appimage

00:13:37

passed #57471639
win32_build

00:06:27

manual #57471641
windows allowed to fail manual
win32_vs_build
passed #57471640
win64_build

00:05:26

manual #57471642
windows allowed to fail manual
win64_vs_build