Replace the auto-generated code for the menubar of main window

[Necktschnagge]

summary

• Creates menubar, including QMenus and QActions by hand not via the form generator

Follow-up

• 184

[ci-for-necktschnagge]

See dependency diagram here: 057da8792e7f9f2a628eaba3fad08c0b094ffecf.pdf

[ci-for-necktschnagge]

See dependency diagram here: 45690c93a326da12739feddf4e146c161dccc58d.pdf

[ci-for-necktschnagge]

See dependency diagram here: 75debe759faaee920f46e7923258aea274fd40ce.pdf

[ci-for-necktschnagge]

See dependency diagram here: 91ae615bb5b83b91915f6b4e79bc84966b02df2f.pdf

[ci-for-necktschnagge]

See dependency diagram here: 152516904fd5c9a3726370ab6464d31705e3a80d.pdf

[ci-for-necktschnagge]

See dependency diagram here: 45cd4eb9806167091672fccb97c7a69b8bcb42fe.pdf

[ci-for-necktschnagge]

See dependency diagram here: 3abecef61b2ff0983d4cc6246868cc5559709d66.pdf

[Necktschnagge]

@r0ost3r You may squash-merge if everythign green. Please review.

[ci-for-necktschnagge]

See dependency diagram here: b2f88fce116194baf010980c1b75c4f94830883f.pdf