SequenceTitleCell::reloadCell now triggers a layoutSubviews, causing the
vertical alignment to be recomputed. This solves issues regarding the
alignment of a sequence's name and definition, such as :
- typing u_n = v_n ; v_n would be displayed above u_n
- typing u_n = (1/3)/2 then changing to u_n = 1/(2/3) without erasing
the formula first. u_n would no longer be aligned with the = sign.
Change-Id: I4a771d96ea79e42e2f4822e93f9f1cbbcf867610