Collapsible Fixes for issue 1149

[leeberg]

Changes

• Adding "Transparent" String handling to Dashboard Color Class
• Set Default $BackgroundColor of UDcollapsible to 'Transparent'

Addresses: #1149

Testing

**Testing - Note you can still of course specify a background, but it looks good without specfiying a background since the default is now transparent.

    New-UDCollapsible -Popout -Items {
        # Get value (show websocket)

        New-UDCollapsibleItem -Title "Get-UDfsfaElement" -Content {
            New-UDTextbox -Label "Enter srome text" -Id 'MyTextbox'
            New-UDButton -Text 'Get the text' -OnClick {
                Show-UDToast -Message (Get-UDElement -Id 'MyTextbox').Attributes['value']
            }
        }

  
        New-UDCollapsibleItem -Title "THE BLUE BOY" -Content {
            New-UDTextbox -Label "Enter some text" -Id 'MyTextbox'
            New-UDButton -Text 'Get the text' -OnClick {
                Show-UDToast -Message (Get-UDElement -Id 'MyTextbox').Attributes['value']
            }
        } -BackgroundColor "Blue"


        New-UDCollapsibleItem -Title "Get-MyTest" -Content {
            New-UDTextbox -Label "Enter some text" -Id 'MyTextbox'
            New-UDButton -Text 'Get the text' -OnClick {
                Show-UDToast -Message (Get-UDElement -Id 'MyTextbox').Attributes['value']
            }
        }
    }

New-UDCard -Title "Your Employees" -Content {
            "Welcome to Card Town"
        } -BackgroundColor "transparent"

[adamdriscoll]

Nice! I like that we have "transparent" as a color now!