**Requirements**
This ticket can be broken into threefour parts:
1.[] Add the possibility to mark templates as deprecated, add guidance to TemplateData.
2.[] Add the possibility to mark and fill in guidance in the TemplateData editor.
3.[] Create a custom header for deprecated templates, including a warning, in the VE template dialog.
[] Templates marked as deprecated do not display in the list on the initial search dropdown to insert templates. If a user types the exact name of a template anyway, Create a custom header for deprecated templates,then they can add it. includ(This is the same current behavior as deprecated parameters.) The warning a warningheader will also be shown on existing templates, in the VE template dialogwhich later get marked as deprecated after they've already been inserted.
**Mocks**
TemplateData editor: add checkbox
{F32188698}
TemplateData editor: checked, with guidance input below
{F32188699}710}
VE template dialog: header with warning
Background: Yellow90 #FEF6E7 Outline: Yellow50 #FFCC33
Warning use: MessageWidget (type: 'warning', inline: true)
{F32188697}754}
**Requirements**Specs:
[] {F32188741}