Texteditor polishing

WTF - there was an unnecessary div from the texteditor in the filelist html. 
refactored OC.Breadcrumbs to allow injecting the container containing the breadcrumbs (removed the array, as it seems unnecessary and I could not find code that accessed `OC.Breadcrumbs.cumbs` with grep, but maybe @icewind1991 knows a place).
required by https://github.com/owncloud/apps/pull/1313

@jancborchardt @kabum @DeepDiver1975 please review, along with Texteditor polishing PR from apps repo