Fix the issue of the right border flashing on the small button.

styles/public/dropdown/selection_dropdown.ts

@@ -99,6 +99,10 @@ export const selectionDropdown = css`
     border-bottom-left-radius: ${otherThemeVars.border.radius} !important;
     border-bottom-right-radius: ${otherThemeVars.border.radius} !important;
   }
+  /* 修复 Gitea 1.26 (:not(:focus)) 导致的小按钮右边框出现问题, 例如软件包类型, 通常相邻有元素 */
+  .ui.action.input:not([class*="left action"])>.ui.small.dropdown.selection {
+    border-right: none;
+  }
   /* 修复因为上面的排除导致的圆角问题 */
   /* 具体工单页面下依赖菜单选择框 */
   #new-dependency-drop-list.ui.selection.dropdown.active,