The bubbles that appear for tabs (e.g. when opening an email) need dedicated space
With tabs enabled, when you open an email the entire screen shifts down (including the left side panel), then when you delete or close an email the screen shifts back up. When repeatedly reading emails, this gets pretty annoying. The tabs should have dedicated horizontal space (with LESS SURROUNDING WHITESPACE!) so the screen doesn't shift up and down.
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Steven Amorati
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