Don't use 'self' for image editor csp
Don't use 'self' for image editor csp

On desktop, we now serve webview resources from a different origin than the webview itself. This means we no longer can use `'self'` in our CSP as shorthand and instead should always use the provided `cspSource`

Krzysztof-Cieslak/vscode,Microsoft/vscode,eamodio/vscode,eamodio/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode,Microsoft/vscode,eamodio/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,eamodio/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,microsoft/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode