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Just found the "Sidebar target width" parameter under advanced options and deleted the value there. Opened sidewise, and the width was normal. Rechecked the option and it had a value of 275. Minimized and maximuized the chrome window, and it was again too large. Looked at the value in the options and it had been reset to 610. That is where it keeps resetting to obviously. Please search for this value hardcoded in your code somewhere!