_saveFile(sLayer, sNameSpace, sFileName, sFileType, sData, sTransportId, sPackageName, bSupport) {
			return LRepConnector.saveFile(sLayer, sNameSpace, sFileName, sFileType, sData, sTransportId, sPackageName, bSupport).then(this._navToDisplayMode.bind(this));
		}
Send request to back end to saved file.
After the file has been successfully saved, navigates to "Display" mode of the content.
@returns {Promise} <code>LRepConnector</code> "saveFiles" promise
@private