fix(pdf): reuse intro columns from _config.yml

Author: pepinho24

_pdf.yml

@@ -1,165 +1,2 @@
 #Disable CTA panels for PDF
 has_cta_panels: false
-
-intro_columns:
--
-  categories:
-  -
-    title: "Data Management"  
-    items:
-      "ClientDataSource": "clientdatasource/overview"
-      "Data Form": "dataform/overview"
-      "Data Pager": "datapager/overview"
-      "Filter": "filter/overview"
-      "Grid": "grid/overview"
-      "ListBox": "listbox/overview"
-      "ListView": "listview/overview"
-      "OData DataSource": "odatadatasource/overview"
-      "PivotGrid": "pivotgrid/overview"
-      "Spreadsheet": "spreadsheet/overview"
-      "TreeList": "treelist/overview"
-  -
-    title: "Scheduling"
-    items:
-      "Calendar": "calendar/overview"
-      "DatePicker": "datepicker/overview"
-      "DateTimePicker": "datetimepicker/overview"
-      "Gantt": "gantt/overview"
-      "MonthYearPicker": "monthyearpicker/overview"
-      "Scheduler": "scheduler/overview"
-      "TimePicker": "timepicker/overview"
-  -
-    title: "Interactivity & UX"
-    items:
-      "Progress Area": "progressarea/overview"
-      "ProgressBar": "progressbar/overview"
-      "Persistence Framework": "persistenceframework/overview"
-  -
-    title: "Theming"
-    items:
-      "Form Decorator": "formdecorator/overview"
-      "Skin Manager": "controls/radskinmanager"
-      "StyleSheet Manager": "stylesheetmanager/overview"
-  -
-    title: "AJAX"
-    items:
-      "AjaxLoadingPanel": "ajaxloadingpanel/overview"
-      "AjaxManager": "ajaxmanager/overview"
-      "AjaxPanel": "ajaxpanel/overview"
-      "XmlHttpPanel": "xmlhttppanel/overview"
-  -
-    title: "Conversational UI"
-    items:
-      "Chat": "chat/overview"
-  -
-    title: "PDF"
-    items:
-      "Client Export Manager": "clientexportmanager/overview"
-      "PdfViewer": "pdfviewer/overview"
-  -
-    title: "Layout"
-    items:
-      "Dock": "dock/overview"
-      "Notification": "notification/overview"
-      "Page Layout": "pagelayout/overview"
-      "Splitter": "splitter/overview"
-      "ToolTip": "tooltip/overview"
-      "TileList": "tilelist/overview"
-      "Window": "window/overview"
-      "Wizard": "wizard/overview"
-  -
-    title: "Editors"
-    items:
-      "AutoCompleteBox": "autocompletebox/overview"
-      "Color Picker": "colorpicker/overview"
-      "ComboBox": "combobox/overview"
-      "DateInput": "raddateinput/overview"
-      "DropDownList": "dropdownlist/overview"
-      "DropDownTree": "dropdowntree/overview"
-      "Editor": "editor/overview"
-      "Image Editor": "imageeditor/overview"
-      "InputManager": "radinputmanager/overview"
-      "Label": "label/overview"
-      "MaskedTextBox": "radmaskedtextbox/overview"
-      "MultiColumnComboBox": "multicolumncombobox/overview"
-      "MultiSelect": "multiselect/overview"
-      "NumericTextBox": "numerictextbox/overview"
-      "Slider": "slider/overview"
-      "TextBox": "radtextbox/overview"
--
-  categories:
-  -
-    title: "Diagrams & Maps"
-    items:
-      "Diagram": "diagram/overview"
-      "Org Chart": "orgchart/overview/overview"
-      "Map": "map/overview"
-      "TreeMap": "treemap/overview"
-  -
-    title: "Data Visualization"
-    items:
-      "Barcode": "barcode/overview"
-      "Binary Image": "controls/radbinaryimage"
-      "Chart (HTML5)": "htmlchart/overview"
-      "Gauge": "gauge/overview"
-      "Rotator": "rotator/overview"
-      "Ticker": "rotator/data-binding/binding-radticker"
-  -
-    title: "Navigation"
-    items:
-      "Button": "button/telerik's-asp.net-button-overview"
-      "CheckBox": "checkbox/overview"
-      "CheckBoxList": "checkboxlist/overview"
-      "Drawer": "drawer/overview"
-      "ImageButton": "imagebutton/overview"
-      "LinkButton": "linkbutton/overview"
-      "Menu": "menu/overview"
-      "Navigation": "navigation/overview"
-      "PanelBar": "panelbar/overview/overview"
-      "PushButton": "pushbutton/overview"
-      "RadioButtonList": "radiobuttonlist/overview"
-      "RibbonBar": "ribbonbar/overview"
-      "SearchBox": "searchbox/overview"
-      "SiteMap": "sitemap/overview"
-      "Tab Strip": "tabstrip/overview"
-      "Timeline": "timeline/overview"
-      "ToggleButton": "togglebutton/overview"
-      "ToolBar": "toolbar/overview"
-      "TreeView": "treeview/overview"
-  -
-    title: "File Upload & Management"
-    items:      
-      "File Explorer": "fileexplorer/overview"
-      "Upload (Async)": "asyncupload/overview"
-      "Upload (Cloud)": "cloudupload/overview"
-  -
-    title: "Document Processing"
-    items:      
-      "PdfProcessing": "radpdfprocessing-overview"
-      "SpreadProcessing": "radspreadprocessing-overview"
-      "SpreadStreamProcessing": "spreadstreamprocessing-overview"
-      "WordsProcessing": "radwordsprocessing-overview"
-      "Zip Library": "radziplibrary-overview"
-  -
-    title: "Media"
-    items:
-      "Image Gallery": "imagegallery/overview"
-      "LightBox": "lightbox/overview"
-      "Media Player": "mediaplayer/overview"
-  -
-    title: "Social"
-    items:
-      "Captcha": "captcha/overview"
-      "Rating": "rating/overview"
-      "SocialShare": "socialshare/overview"
-      "TagCloud": "tagcloud/overview"
-  -
-    title: "Spell Checking"
-    items:
-      "Spell": "spell/overview"
-  -
-    title: "Common"
-    items:
-      "Compression": "controls/radcompression"
-      "Script Manager": "scriptmanager/overview"
-