Standardize .NET 5 terminology - WinForms

[gewarren]

Related to #7418

Hide whitespace changes in diff.

[opbld31]

Docs Build status updates of commit 88c544e:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Windows.Forms.VisualStyles/VisualStyleRenderer.xml	✅Succeeded	View
xml/System.Windows.Forms/Control+ControlCollection.xml	✅Succeeded	View
xml/System.Windows.Forms/DataFormats.xml	✅Succeeded	View
xml/System.Windows.Forms/DataGridViewButtonCell+DataGridViewButtonCellAccessibleObject.xml	✅Succeeded	View
xml/System.Windows.Forms/DataGridViewCheckBoxCell+DataGridViewCheckBoxCellAccessibleObject.xml	✅Succeeded	View
xml/System.Windows.Forms/DataGridViewColumnHeaderCell+DataGridViewColumnHeaderCellAccessibleObject.xml	✅Succeeded	View
xml/System.Windows.Forms/DataGridViewComboBoxEditingControl.xml	✅Succeeded	View
xml/System.Windows.Forms/DataGridViewImageCell+DataGridViewImageCellAccessibleObject.xml	✅Succeeded	View
xml/System.Windows.Forms/DataGridViewLinkCell+DataGridViewLinkCellAccessibleObject.xml	✅Succeeded	View
xml/System.Windows.Forms/InputLanguageChangedEventArgs.xml	✅Succeeded	View
xml/System.Windows.Forms/ListBox+IntegerCollection.xml	✅Succeeded	View
xml/System.Windows.Forms/ListBox+ObjectCollection.xml	✅Succeeded	View
xml/System.Windows.Forms/ListView+ListViewItemCollection.xml	✅Succeeded	View
xml/System.Windows.Forms/ListView+SelectedIndexCollection.xml	✅Succeeded	View
xml/System.Windows.Forms/ListViewGroup.xml	✅Succeeded	View
xml/System.Windows.Forms/NotifyIcon.xml	✅Succeeded	View
xml/System.Windows.Forms/RichTextBox.xml	✅Succeeded	View
xml/System.Windows.Forms/ScrollableControl.xml	✅Succeeded	View
xml/System.Windows.Forms/StatusBar.xml	✅Succeeded	View
xml/System.Windows.Forms/StatusBarPanel.xml	✅Succeeded	View
xml/System.Windows.Forms/StatusStrip.xml	✅Succeeded	View
xml/System.Windows.Forms/TabControl.xml	✅Succeeded	View
xml/System.Windows.Forms/TableLayoutControlCollection.xml	✅Succeeded	View
xml/System.Windows.Forms/ToolStripRenderer.xml	✅Succeeded	View
xml/System.Windows.Forms/ToolStripStatusLabel.xml	✅Succeeded	View
xml/System.Windows.Forms/TreeNode.xml	✅Succeeded	View
xml/System.Windows.Forms/TreeNodeCollection.xml	✅Succeeded	View

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Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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