Announcement text for the KDE Applications 19.04 release

[Christoph Feck]

Hello developers,

the Applications/19.04 branches have been created, which means the
branches are feature-frozen. Our first release for 2019 is nearing!

Please help our promotion team to write an announcement text that
summarizes all the work that went into KDE Applications since our 18.12
release.

I created https://phabricator.kde.org/T10636 which has a link for the
Etherpad document at https://notes.kde.org/p/applications_19.04_new_features

Please fill this document in the next few days.

-- 
Christoph Feck
KDE Release Team