How to dynamically populate the tree view dropdown menu?

How to dynamically populate the tree view dropdown menu?

Populate the link tree view dropdown menu

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Insert Paragraph

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Insert today's date

Insert the current time

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Insert Layer

Insert groupbox

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Insert Numbered List

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Indent Text

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HTML

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Add new tree view dropdown menu

Save

Bold

Italic

Underline

Left Justify

Center

Right Justify

Save

Select All - CTRL+A

Select None

Normal

HTML

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Resize