fix(listview): fix search input clipping and match antd option height

Remove overflow:hidden from PanelContainer so the Input focus ring
is not clipped at the panel boundary.

Set OptionItem line-height to theme.lineHeight and derive the vertical
padding from antd's exact formula (controlHeight - fontSize * lineHeight) / 2,
matching the height of antd Select dropdown options in Explore.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

superset-frontend/src/components/ListView/Filters/CompactSelectPanel.tsx

@@ -57,7 +57,6 @@ const PanelContainer = styled.div`
     display: flex;
     flex-direction: column;
     border-radius: ${theme.borderRadiusLG}px;
-    overflow: hidden;
     background: ${theme.colorBgElevated};
     box-shadow: ${theme.boxShadowSecondary};
     padding: 0 0 ${theme.paddingXXS}px;
@@ -86,7 +85,9 @@ const OptionItem = styled.li<{ $active: boolean }>`
     display: flex;
     align-items: center;
     justify-content: space-between;
-    padding: 5px ${theme.sizeUnit * 3}px;
+    padding: ${(theme.controlHeight - theme.fontSize * theme.lineHeight) /
+      2}px ${theme.controlPaddingHorizontal}px;
+    line-height: ${theme.lineHeight};
     cursor: pointer;
     font-size: ${theme.fontSize}px;
     color: ${theme.colorText};