You can move the tabs, if you enable that in the Editor component settings!
Regarding the double quotation marks: does the font you're using have them?
Switching from Mac to Linux I tried out Frescobaldi as a Lilypond environment. I really thank the developers for such a well thought-out tool which from my point of view so far leaves almost nothing uncovered. It seems to be quite perfect and is very helpful in every respect. The only thing I miss is that you could change the order of the tabs in the editor by dragging them, when you have several documents open (working on a score and separate parts for instance), but this is really a minor issue. Ah, and one other little thing: inserting double quotation marks does not work...
An open, cross-platform journaling program.
A scientific plotting package.