D28714: Refactor enableBluetooth function

[Nicolas Fella]

nicolasfella created this revision.
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REVISION SUMMARY
  The code has quite some boilerplate and high levels of indentation, resulting in poor readability. Factoring out the DBus boilerplate makes it easier to focus on the essential parts.

TEST PLAN
  (de)activated flight mode. Bluetooth was (dis)abled accordingly

REPOSITORY
  R116 Plasma Network Management Applet

BRANCH
  bluetooth

REVISION DETAIL
  https://phabricator.kde.org/D28714

AFFECTED FILES
  libs/handler.cpp

To: nicolasfella, #plasma, jgrulich
Cc: plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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