Bug#888574: atril: Introduce 'trim margin' feature

[Alek <reportbug_dead-address@jalsti.de>]

Source: atril
Severity: wishlist

Dear Maintainer,

a new 'trim margin' feature for the 'View' menu would be a great
improvment of Atril. 
Activating that new option should then crop the view of every page in the 
currently opened PDF file to its bounding box, giving more room for the
text (especially when dual page view mode is active). 
(Just like podofocrop does, or like the same feature in Okular)

Thx :-)

-- System Information:
Debian Release: 9.2
  APT prefers stable-update
  APT policy: (500, 'stable-updates'), (500, 'proposed-updates'), (500, 'oldstable-updates'), (500, 'oldstable-proposed-updates'), (500, 'oldoldstable-updates'), (500, 'oldoldstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)