fix: Remove LONG_POPUP_WIDTH constant from model hover. (#234)

Author: ethanyhou

com.microsoft.copilot.eclipse.ui/src/com/microsoft/copilot/eclipse/ui/swt/DropdownPopup.java

@@ -49,7 +49,6 @@ class DropdownPopup {
   private static final int BORDER_ARC = 8;
   private static final int MAX_VISIBLE_ITEMS = 15;
   private static final int SHORT_POPUP_WIDTH = 250;
-  private static final int LONG_POPUP_WIDTH = 300;
 
   private static Image checkIcon;
 
@@ -518,11 +517,9 @@ private void openHoverShell(DropdownItem item, Composite anchorItem) {
 
     hoverShell.pack();
     Point hoverSize = hoverShell.getSize();
-    int width = hoverSize.x <= SHORT_POPUP_WIDTH ? SHORT_POPUP_WIDTH : LONG_POPUP_WIDTH;
-    if (width != hoverSize.x) {
-      // Recompute size at the target width so wrapped labels lay out correctly.
-      hoverSize = hoverShell.computeSize(width, SWT.DEFAULT);
-      hoverSize.x = width;
+    if (hoverSize.x < SHORT_POPUP_WIDTH) {
+      hoverSize = hoverShell.computeSize(SHORT_POPUP_WIDTH, SWT.DEFAULT);
+      hoverSize.x = SHORT_POPUP_WIDTH;
       hoverShell.setSize(hoverSize);
     }