Draft: Allow copying of circuit details information

I added a text box which is displayed below the circuit details labels on the right hand side of the GUI. This text box contains the same information displayed in the labels above, except that the text inside the text box can be selected and copied to clipboard. I decided to add an additional text box instead of just making the labels selectable because making the labels selectable doesn't allow the user to copy information within multiple labels at once. Inspiration after reading issue tails#12114 (closed)