D26738: Fix typo, launch plugin with argument, change signals

[Alexander Lohnau]

alex created this revision.
alex added a reviewer: broulik.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
alex requested review of this revision.

REVISION SUMMARY
  The typo in the HACKING file has been fixed, the kcms/runners plugin is now able to launch a specific plugin using the --arg parameter of kcmshell5 and the deprecated signals have been changed.
  And the QLatin1String has been replaced by the QStringLiteral Macro, because the open config method does not have an overload with the QLatin1String class.

TEST PLAN
  You can just type "kcmshell5 plasmasearch --args Dictionary" and additionally to the KRunner configs it should open the plugin config

REPOSITORY
  R119 Plasma Desktop

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D26738

AFFECTED FILES
  HACKING
  kcms/runners/kcm.cpp
  kcms/runners/kcm.h

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