D9422: [Connection Item] Use QtQuick's built-in HSV color features for cycling download color

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, jgrulich.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

TEST PLAN
  `Qt.hsva` was added in Qt 5.5 and the `hsvHue` stuff was merged in July 2016, so should be fine to use now.
  
  Color looks the same as before. Value needs to be `[0,1]` hence the `+0.5` and modulo. I tried just `+=`'ing `hsvHue` but that didn't work.
  
  Btw, isn't that just inverting the color? ie. we could just 1-r, 1-g, 1-b the color?

REPOSITORY
  R116 Plasma Network Management Applet

REVISION DETAIL
  https://phabricator.kde.org/D9422

AFFECTED FILES
  applet/contents/ui/ConnectionItem.qml

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