Remove class names from documentation headers (#8642)

* Remove class names from documentation headers

documentation/components/components-button.asciidoc

 ---
 
 [[components.button]]
-= [classname]#Button#
+= Button
 
 ifdef::web[]
 [.sampler]

documentation/components/components-checkbox.asciidoc

 ---
 
 [[components.checkbox]]
-= [classname]#CheckBox#
+= CheckBox
 
 ifdef::web[]
 [.sampler]

documentation/components/components-combobox.asciidoc

 ---
 
 [[components.combobox]]
-= [classname]#ComboBox#
+= ComboBox
 
 ifdef::web[]
 [.sampler]

documentation/components/components-customcomponent.asciidoc

 ---
 
 [[components.customcomponent]]
-= Composition with [classname]#CustomComponent#
+= Composition with CustomComponent
 
 The ease of making new user interface components is one of the core features of
 Vaadin. Typically, you simply combine existing built-in components to produce

documentation/components/components-customfield.asciidoc

 ---
 
 [[components.customfield]]
-= Composite Fields with [classname]#CustomField#
+= Composite Fields with CustomField
 
 The [classname]#CustomField# is a way to create composite components as with [classname]#CustomComponent#, except that it implements the [interfacename]#Field# interface and inherits [classname]#AbstractField#, described in <<dummy/../../../framework/components/components-fields#components.fields,"Field Components">>.
 A field allows editing a property value in the data model, and can be bound to data with [classname]#Binder#, as described in <<dummy/../../../framework/datamodel/datamodel-forms#datamodel.forms, "Binding Data to Forms">>.

documentation/components/components-datefield.asciidoc

 ---
 
 [[components.datefield]]
-= Date Input with [classname]#DateField#
+= Date Input with DateField
 
 ifdef::web[]
 [.sampler]

documentation/components/components-grid.asciidoc

 ---
 
 [[components.grid]]
-= [classname]#Grid#
+= Grid
 
 ifdef::web[]
 [.sampler]

documentation/components/components-label.asciidoc

 ---
 
 [[components.label]]
-= [classname]#Label#
+= Label
 
 ifdef::web[]
 [.sampler]

documentation/components/components-link.asciidoc

 ---
 
 [[components.link]]
-= [classname]#Link#
+= Link
 
 ifdef::web[]
 [.sampler]

documentation/components/components-listselect.asciidoc

 ---
 
 [[components.listselect]]
-= [classname]#ListSelect#
+= ListSelect
 
 ifdef::web[]
 [.sampler]

documentation/components/components-menubar.asciidoc

 ---
 
 [[components.menubar]]
-= [classname]#MenuBar#
+= MenuBar
 
 ifdef::web[]
 [.sampler]

documentation/components/components-nativeselect.asciidoc

 ---
 
 [[components.nativeselect]]
-= [classname]#NativeSelect#
+= NativeSelect
 
 ifdef::web[]
 [.sampler]

documentation/components/components-optiongroups.asciidoc

 ---
 
 [[components.optiongroups]]
-= [classname]#CheckBoxGroup# and [classname]#RadioButtonGroup#
+= CheckBoxGroup and RadioButtonGroup
 
 ifdef::web[]
 [.sampler]

documentation/components/components-passwordfield.asciidoc

 ---
 
 [[components.passwordfield]]
-= [classname]#PasswordField#
+= PasswordField
 
 ifdef::web[]
 [.sampler]

documentation/components/components-popupview.asciidoc

 ---
 
 [[components.popupview]]
-= [classname]#PopupView#
+= PopupView
 
 ifdef::web[]
 [.sampler]

documentation/components/components-progressbar.asciidoc

 ---
 
 [[components.progressbar]]
-= [classname]#ProgressBar#
+= ProgressBar
 
 ifdef::web[]
 [.sampler]

documentation/components/components-richtextarea.asciidoc

 ---
 
 [[components.richtextarea]]
-= [classname]#RichTextArea#
+= RichTextArea
 
 ifdef::web[]
 [.sampler]

documentation/components/components-slider.asciidoc

 ---
 
 [[components.slider]]
-= [classname]#Slider#
+= Slider
 
 ifdef::web[]
 [.sampler]

documentation/components/components-textarea.asciidoc

 ---
 
 [[components.textarea]]
-= [classname]#TextArea#
+= TextArea
 
 ifdef::web[]
 [.sampler]

documentation/components/components-textfield.asciidoc

 ---
 
 [[components.textfield]]
-= [classname]#TextField#
+= TextField
 
 ifdef::web[]
 [.sampler]

documentation/components/components-twincolselect.asciidoc

 ---
 
 [[components.twincolselect]]
-= [classname]#TwinColSelect#
+= TwinColSelect
 
 ifdef::web[]
 [.sampler]

documentation/components/components-upload.asciidoc

 ---
 
 [[components.upload]]
-= [classname]#Upload#
+= Upload
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-absolutelayout.asciidoc

 ---
 
 [[layout.absolutelayout]]
-= [classname]#AbsoluteLayout#
+= AbsoluteLayout
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-accordion.asciidoc

 ---
 
 [[layout.accordion]]
-= [classname]#Accordion#
+= Accordion
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-csslayout.asciidoc

 ---
 
 [[layout.csslayout]]
-= [classname]#CssLayout#
+= CssLayout
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-formlayout.asciidoc

 ---
 
 [[layout.formlayout]]
-= [classname]#FormLayout#
+= FormLayout
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-gridlayout.asciidoc

 ---
 
 [[layout.gridlayout]]
-= [classname]#GridLayout#
+= GridLayout
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-orderedlayout.asciidoc

 ---
 
 [[layout.orderedlayout]]
-= [classname]#VerticalLayout# and [classname]#HorizontalLayout#
+= VerticalLayout and HorizontalLayout
 
 [classname]#VerticalLayout# and [classname]#HorizontalLayout# are ordered
 layouts for laying components out either vertically or horizontally,

documentation/layout/layout-panel.asciidoc

 ---
 
 [[layout.panel]]
-= [classname]#Panel#
+= Panel
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-splitpanel.asciidoc

 ---
 
 [[layout.splitpanel]]
-= [classname]#HorizontalSplitPanel# and [classname]#VerticalSplitPanel#
+= HorizontalSplitPanel and VerticalSplitPanel
 
 ifdef::web[]
 [.sampler]

documentation/layout/layout-tabsheet.asciidoc

 ---
 
 [[layout.tabsheet]]
-= [classname]#TabSheet#
+= TabSheet
 
 ifdef::web[]
 [.sampler]