Bug 993932: remove border-color transition to remedy TART regression. r=dao, a=sylvestre.

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extra : transplant_source : l7%A8H%0F%1B%98%E0%16%F39%21%CB%D1%0D%8DO%A5%898
Bug 995161 - Customize mode can still break after bootstrapped add-on with custom legacy:true toolbar restarts. r=Gijs, a=sylvestre.

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rename : browser/components/customizableui/test/browser_989609_bootstrapped_custom_toolbar.js => browser/components/customizableui/test/browser_bootstrapped_custom_toolbar.js
extra : transplant_source : %93%DC%EA%FC%B1%E6%2C%A6%26%A4%E0k%CDq%20%8A%5E%24%B9j
Bug 989683 - restrict how we inherit the menubar text color to tabsintitlebar cases on non-aero, r=dao, a=sylvestre.

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extra : transplant_source : aj%8DND%9E%FCr%A7%EA%12%3D%96%98%BCco%F2%EDB