D7205: Don't require X11 to save font DPI to config

[David Edmundson]

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

REVISION SUMMARY
  startplasma (wayland) uses the font DPI value from this config.
  We don't require X11 to show a spinbox and save it to a file.
  
  The part that calls into xrdb is still guarded.

TEST PLAN
  Compiled
  Compiled with #undef HAVE_X11 added after including config-workspace.
  Still had the UI setting

REPOSITORY
  R119 Plasma Desktop

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D7205

AFFECTED FILES
  kcms/fonts/fonts.cpp

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