Currently, as user Scott_Y put it so well back then, Ctrl+Tab and Ctrl+Shift+Tab are shortcuts to reach the spatially adjacent tabs while the possibility exists to refer to the temporally adjacent tabs (I find it to be the case typically in tabbed text editors or IDEs such as TextPad, Notepad++, Eclipse, and Netbeans).
I believe a somewhat simple solution could be the creation of two new commands in the "Define keyboard shortcut" dialog. Currently, the shortcuts at hand are assigned to:
- Tab: Next folder tab
- Tab: Previous folder tab
- Tab: Cycle forward through visited tabs
- Tab: Cycle backward through visited tabs