fix(aalborg_theme): only pass body_attrs if they are set

Follow-up of #6479
fix(UserPicker): no messages in userpicker due to lack of i18n

default elgg autocomplete disabled the messages in jquery autocomplete,
this now also applies to the UserPicker
chore(release): v1.9.0-rc.1
Merge pull request #6860 from beck24/release-1.9.0-rc.1

chore(release): v1.9.0-rc.1
fix(deprecated): Corrected invalid deprecation notice and added more details to few others

Fixes #6869
Merge pull request #6848 from PerJensen/aalborg_update_pageshell

fix(aalborg_theme): only pass body_attrs if they are set
Merge pull request #6870 from Srokap/ticket_6869

fix(deprecated): Corrected invalid deprecation notice and added more details to few others
Merge pull request #6861 from jdalsem/UserPicker-i18n

fix(UserPicker): no messages in userpicker due to lack of i18n
chore(ci): Encrypted notification email

This is to avoid receiving notification from forks. See http://docs.travis-ci.com/user/encryption-keys/
Merge pull request #6877 from Srokap/notification_email

chore(ci): Encrypted notification email
fix(docs): Inline refs use @link instead of @see

Inline references in documentation should use {@link ...}
Merge pull request #6881 from Srokap/pr/6871

fix(docs): Inline refs use @link instead of @see
fix(aalborg_theme): inconsistency between owner-block and page menu
Merge pull request #6887 from PerJensen/aalborg_menu

fix(aalborg_theme): inconsistency between owner-block and page menu
fix(aalborg_theme): show dashboard menu item only when logged in

Fixes  #6049
Merge pull request #6898 from PerJensen/1.9

fix(aalborg_theme): show dashboard menu item only when logged in
fix(aalborg_theme): Support fullscreen mode if user adds app to homescreen

Fixes #6896
Merge pull request #6904 from ewinslow/mobile-web-app-capable-b6896

fix(aalborg_theme): Support fullscreen mode if user adds app to homescreen
fix(aalborg_theme): emphasizes sidebar navigation

Fixes #6874
Merge pull request #6915 from PerJensen/aalborg_sidebar_navigation

fix(aalborg_theme): emphasizes sidebar navigation