[Merge] ~3v1n0/ubuntu/+source/gnome-shell:ubuntu/bionic-xubuntu-cancel-search into ~ubuntu-desktop/ubuntu/+source/gnome-shell:ubuntu/bionic

[Marco Trevisan (Treviño)]

Ok, I've finally rebased this.
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https://code.launchpad.net/~3v1n0/ubuntu/+source/gnome-shell/+git/gnome-shell/+merge/358477
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