Resize width of left panel
For shrink empty fields in the left panel let a user to resize it's width. Shortcuts: "w" for more width, "shift+w" for less width. Any small step will be ideal (i.e. 10px or 5%). And mouse draging of couse need.
You could now change width of the left panel in Appearance dialog (Shift+T or settings => Appearance).
There is a “Left panel” setting at the bottom with increase/decrease/reset options.
Anatoly Vorobey commented
Please add some way to resize the left panel's width. With the new addition of font controls, it can now easily become way too short, and most blogs' names in my feed are cut off.