Wt

WSuggestionPopup.js uses the following function to determine if the user clicked on the dropdown button:

    function calcButtonWidth(edit) {
      if (isBS5()) {
        try {
          const style = getComputedStyle(edit);
          const widthPx = parseInt(style.backgroundSize.match(/^([0-9]+)px ([0-9]+)px$/)[1], 10);
          const rightOffsetPx = parseInt(style.backgroundPositionX.match(/^calc[(]100% - ([0-9]+)px[)]$/)[1], 10);
          return widthPx + rightOffsetPx;
        } catch (e) {
          return 28;
        }
      } else {
        return 16;
      }
    }

Non-Bootstrap 5 themes use a fixed width of 16px.
However, the suggestion dropdown buttons have larger sizes:

• Bootstrap 2: icon width 20px
• Bootstrap 3: icon width 20px
• Polished theme: icon width 19px
• Default theme: icon width 19px

As a consequence, clicking on the left-hand size of the button does not show the dropdown menu.

Proposed change: increase the default width to 20px for non-Bootstrap 5 themes.