Merge branch 'typo3v8compatibility' into 'master'

...demirror/plugins/codemirror/CodeMirror/demo/closetag.html

...demirror/plugins/codemirror/CodeMirror/demo/complete.html

...-codemirror/plugins/codemirror/CodeMirror/demo/emacs.html

...odemirror/plugins/codemirror/CodeMirror/demo/folding.html

...mirror/plugins/codemirror/CodeMirror/demo/fullscreen.html

...demirror/plugins/codemirror/CodeMirror/demo/hardwrap.html

...ror/plugins/codemirror/CodeMirror/demo/html5complete.html

...mirror/plugins/codemirror/CodeMirror/demo/indentwrap.html

...e-codemirror/plugins/codemirror/CodeMirror/demo/lint.html

...demirror/plugins/codemirror/CodeMirror/demo/loadmode.html

...codemirror/plugins/codemirror/CodeMirror/demo/marker.html

...ror/plugins/codemirror/CodeMirror/demo/markselection.html

.../plugins/codemirror/CodeMirror/demo/matchhighlighter.html

...emirror/plugins/codemirror/CodeMirror/demo/matchtags.html

...-codemirror/plugins/codemirror/CodeMirror/demo/merge.html

...emirror/plugins/codemirror/CodeMirror/demo/multiplex.html

...demirror/plugins/codemirror/CodeMirror/demo/mustache.html

...-codemirror/plugins/codemirror/CodeMirror/demo/panel.html

...irror/plugins/codemirror/CodeMirror/demo/placeholder.html

...odemirror/plugins/codemirror/CodeMirror/demo/preview.html