The ace:selectMenu and ace:comboBox components have been using a rigid/fixed layout to place their value fields and down-arrow buttons, resulting in having to determine the heights and widths of these parts with specific pixel dimensions. When using a font size larger than the normal one, the down-arrow button may look disproportionately smaller or narrower. This, in part, has been due to the use of Themeroller icons, which have specific dimensions. After ICE-10486 and ICE-10483, this has been changed to use a Font Awesome character instead, so the size of the down-arrow button is proportional to the font size. It is no longer necessary to calculate specific heights in pixels for these components. However, a specific width in pixels is still being calculated for the value fields. This improvement is to find a way to not have the need to set a specific width and thus have a more fluid layout that easily adjusts to other styling factors.