[Differential] [Request, 4 lines] D4606: don't show 0% when no battery

[Marco Martin]

mart created this revision.
mart added a reviewer: Plasma.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  if there is no battery don't show 0%, but a - on
  the badge. still show the badge to show the option is not broken,
  but don't show a weird 0% of a non existing battery

TEST PLAN
  works on both systems with or without battery

REPOSITORY
  R120 Plasma Workspace

BRANCH
  phab/batterybadge

REVISION DETAIL
  https://phabricator.kde.org/D4606

AFFECTED FILES
  applets/batterymonitor/package/contents/ui/BadgeOverlay.qml
  applets/batterymonitor/package/contents/ui/CompactRepresentation.qml

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: mart, #plasma
Cc: plasma-devel, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol
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