6561 add winbox

added 5 commits

• 059454e0 - update toggleShellWindow()
• 98023373 - update cs for shell plugins
• 6b3fccfd - cleanup plugin renderer
• 3be55c6f - remove addi.class.js
• 8c7135f5 - cleanup code: addi references, ...

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marked this merge request as ready

mentioned in commit 6caec0f3

merged