VS 2013 C++ sometimes opens a file with a tab at the right of the tab group instead of adding it to the open tabs at the left, and if you hover the mouse over the tab, it says “Preview of <file>” instead of just “<file>”. If you drag the tab to the group at the left, the “Preview of” part of the hover label goes away. What is the point of this? Is there different functionality involved? If not, is there a way to disable this distracting behavior?
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