D24692: Show version information in about screen

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, fvogt, ognarb.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
broulik requested review of this revision.

REVISION SUMMARY
  It can be useful to know what version of host you're using.
  For older hosts, this information just isn't displayed as the `getVersion` call will never be answered and the `<p>` is hidden by default.

TEST PLAN
  5.17 for the host side?
  
  F7606789: Screenshot_20191016_133050.png <https://phabricator.kde.org/F7606789>

REPOSITORY
  R856 Plasma Browser Integration

REVISION DETAIL
  https://phabricator.kde.org/D24692

AFFECTED FILES
  extension/_locales/en/messages.json
  extension/extension.js
  extension/options.html
  extension/options.js
  host/CMakeLists.txt
  host/config-host.h.cmake
  host/settings.cpp

To: broulik, #plasma, fvogt, ognarb
Cc: plasma-devel, crossi, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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