Generic highlighter: Make the editor more flexible concerning highlighting.
Generic highlighter: Make the editor more flexible concerning highlighting.

Now the plain text editor only tries to apply a highlight configuration
if the MIME type passed is valid. Otherwise, it should behave as an ordinary
trivial editor and should not miss a highlight definition.

martyone/sailfish-qtcreator,KDE/android-qt-creator,KDE/android-qt-creator,duythanhphan/qt-creator,hdweiss/qt-creator-visualizer,renatofilho/QtCreator,kuba1/qtcreator,KDAB/KDAB-Creator,jonnor/qt-creator,colede/qtcreator,KDAB/KDAB-Creator,hdweiss/qt-creator-visualizer,martyone/sailfish-qtcreator,danimo/qt-creator,farseerri/git_code,syntheticpp/qt-creator,darksylinc/qt-creator,yinyunqiao/qtcreator,martyone/sailfish-qtcreator,malikcjm/qtcreator,amyvmiwei/qt-creator,jonnor/qt-creator,sandsmark/qtcreator-minimap,richardmg/qtcreator,AltarBeastiful/qt-creator,kuba1/qtcreator,KDE/android-qt-creator,darksylinc/qt-creator,richardmg/qtcreator,dmik/qt-creator-os2,renatofilho/QtCreator,farseerri/git_code,farseerri/git_code,amyvmiwei/qt-creator,azat/qtcreator,farseerri/git_code,xianian/qt-creator,malikcjm/qtcreator,sandsmark/qtcreator-minimap,sandsmark/qtcreator-minimap,hdweiss/qt-creator-visualizer,KDE/android-qt-creator,dmik/qt-creator-os2,malikcjm/qtcreator,farseerri/git_code,danimo/qt-creator,bakaiadam/collaborative_qt_creator,ostash/qt-creator-i18n-uk,ostash/qt-creator-i18n-uk,darksylinc/qt-creator,bakaiadam/collaborative_qt_creator,Distrotech/qtcreator,farseerri/git_code,richardmg/qtcreator,darksylinc/qt-creator,maui-packages/qt-creator,darksylinc/qt-creator,renatofilho/QtCreator,AltarBeastiful/qt-creator,ostash/qt-creator-i18n-uk,malikcjm/qtcreator,KDAB/KDAB-Creator,xianian/qt-creator,KDAB/KDAB-Creator,darksylinc/qt-creator,dmik/qt-creator-os2,kuba1/qtcreator,AltarBeastiful/qt-creator,duythanhphan/qt-creator,duythanhphan/qt-creator,dmik/qt-creator-os2,martyone/sailfish-qtcreator,xianian/qt-creator,amyvmiwei/qt-creator,richardmg/qtcreator,bakaiadam/collaborative_qt_creator,amyvmiwei/qt-creator,omniacreator/qtcreator,ostash/qt-creator-i18n-uk,omniacreator/qtcreator,omniacreator/qtcreator,maui-packages/qt-creator,pcacjr/qt-creator,bakaiadam/collaborative_qt_creator,syntheticpp/qt-creator,syntheticpp/qt-creator,yinyunqiao/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,yinyunqiao/qtcreator,yinyunqiao/qtcreator,martyone/sailfish-qtcreator,sandsmark/qtcreator-minimap,darksylinc/qt-creator,malikcjm/qtcreator,kuba1/qtcreator,duythanhphan/qt-creator,Distrotech/qtcreator,pcacjr/qt-creator,danimo/qt-creator,KDE/android-qt-creator,AltarBeastiful/qt-creator,yinyunqiao/qtcreator,richardmg/qtcreator,azat/qtcreator,syntheticpp/qt-creator,jonnor/qt-creator,maui-packages/qt-creator,xianian/qt-creator,Distrotech/qtcreator,KDAB/KDAB-Creator,KDAB/KDAB-Creator,omniacreator/qtcreator,pcacjr/qt-creator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,duythanhphan/qt-creator,KDE/android-qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,hdweiss/qt-creator-visualizer,colede/qtcreator,pcacjr/qt-creator,richardmg/qtcreator,farseerri/git_code,pcacjr/qt-creator,AltarBeastiful/qt-creator,ostash/qt-creator-i18n-uk,ostash/qt-creator-i18n-uk,sandsmark/qtcreator-minimap,Distrotech/qtcreator,omniacreator/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,dmik/qt-creator-os2,duythanhphan/qt-creator,hdweiss/qt-creator-visualizer,azat/qtcreator,azat/qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,syntheticpp/qt-creator,malikcjm/qtcreator,hdweiss/qt-creator-visualizer,bakaiadam/collaborative_qt_creator,amyvmiwei/qt-creator,jonnor/qt-creator,Distrotech/qtcreator,xianian/qt-creator,renatofilho/QtCreator,danimo/qt-creator,Distrotech/qtcreator,dmik/qt-creator-os2,bakaiadam/collaborative_qt_creator,colede/qtcreator,azat/qtcreator,maui-packages/qt-creator,omniacreator/qtcreator,kuba1/qtcreator,amyvmiwei/qt-creator,yinyunqiao/qtcreator,pcacjr/qt-creator,yinyunqiao/qtcreator,xianian/qt-creator,kuba1/qtcreator,duythanhphan/qt-creator,kuba1/qtcreator,richardmg/qtcreator,Distrotech/qtcreator,danimo/qt-creator,azat/qtcreator,danimo/qt-creator,sandsmark/qtcreator-minimap,amyvmiwei/qt-creator,dmik/qt-creator-os2,jonnor/qt-creator,kuba1/qtcreator,kuba1/qtcreator,KDE/android-qt-creator,xianian/qt-creator,omniacreator/qtcreator,syntheticpp/qt-creator,malikcjm/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,bakaiadam/collaborative_qt_creator,colede/qtcreator,danimo/qt-creator,colede/qtcreator,renatofilho/QtCreator,colede/qtcreator,maui-packages/qt-creator,jonnor/qt-creator,darksylinc/qt-creator,renatofilho/QtCreator,maui-packages/qt-creator,ostash/qt-creator-i18n-uk,pcacjr/qt-creator,syntheticpp/qt-creator,colede/qtcreator,maui-packages/qt-creator,KDE/android-qt-creator