Adjust calculation of icon pixmap Y value; now based off center of text label bounding rectangle. Previously, icons appeared top-aligned when text size was larger than icon size.
Centering is done by obtaining the center point of the text frame (`m_textRect.center().y()`) and setting the top `Y` point of the icon to one-half of the scaled icon height (`m_scaled_PixmapSize.height()`) Division is done by `2.0`, to ensure calculations are done with floating-point math, in keeping with `QPointF`, which returns floating-point values.
See before and after screenshots.
{F5764918}
Before, showing misalignment (with and without debugging wireframes)
{F5764920}
After, showing correction
BUG: 390771