Adjusted icon size

[chryw]

#45432
@isidorn

• "Continue/Debug" icon is now about the same size as the "Stop" icon
• Reduced base size for all debug icons in editor margin and viewlet.
  

[isidorn]

@chryw I just tried it out and the sizes are great. Everything in the debug toolbar looks perfectly fitting.
I just have 3 pieces of feedback:

• current-and-brekapoint.svg and stackframe-and-breakpoint.svg are not correct, since they only have the arrow, not the red breakpoint dot
• With the new breakpoint size the conditional breakpoint icon does not really work since the equality lines are too far apart (this can also be seen in your screenshot on the BREAKPOINTS view)
• The new breakpoint size makes the breakpoints looks more square like, and not like a perfect circle. I am not sure if this is just me or the shape of the breakpoint also changed, not only the size?