Fix font rendering in the GTK+ backend when using Cairo
Fix font rendering in the GTK+ backend when using Cairo

Always get the Pango context though GTK+ API rather than creating it
from a Cairo context to always get a context set up for the screen.

This fixes font size issues when using Cairo rendering.

keperlia/foo-wsh-panel-mod.scintilla,windoze/scintilla,keperlia/foo-wsh-panel-mod.scintilla,windoze/scintilla,windoze/scintilla,keperlia/foo-wsh-panel-mod.scintilla,windoze/scintilla,windoze/scintilla,keperlia/foo-wsh-panel-mod.scintilla,windoze/scintilla,windoze/scintilla,keperlia/foo-wsh-panel-mod.scintilla,keperlia/foo-wsh-panel-mod.scintilla,windoze/scintilla