[theme] find widget: use widget border instead of panel border (layer breaker)

src/vs/editor/contrib/find/browser/findWidget.ts

@@ -29,7 +29,7 @@ import { CONTEXT_FIND_INPUT_FOCUSED } from 'vs/editor/contrib/find/common/findCo
 import { ITheme, registerThemingParticipant, IThemeService } from 'vs/platform/theme/common/themeService';
 import { Color } from 'vs/base/common/color';
 import { IConfigurationChangedEvent } from 'vs/editor/common/config/editorOptions';
-import { editorFindRangeHighlight, editorFindMatch, editorFindMatchHighlight, activeContrastBorder, contrastBorder, inputBackground, editorWidgetBackground, inputActiveOptionBorder, widgetShadow, inputForeground, inputBorder, inputValidationInfoBackground, inputValidationInfoBorder, inputValidationWarningBackground, inputValidationWarningBorder, inputValidationErrorBackground, inputValidationErrorBorder, errorForeground } from 'vs/platform/theme/common/colorRegistry';
+import { editorFindRangeHighlight, editorFindMatch, editorFindMatchHighlight, activeContrastBorder, contrastBorder, inputBackground, editorWidgetBackground, inputActiveOptionBorder, widgetShadow, inputForeground, inputBorder, inputValidationInfoBackground, inputValidationInfoBorder, inputValidationWarningBackground, inputValidationWarningBorder, inputValidationErrorBackground, inputValidationErrorBorder, errorForeground, editorWidgetBorder } from 'vs/platform/theme/common/colorRegistry';
 
 
 export interface IFindController {
@@ -1071,7 +1071,7 @@ registerThemingParticipant((theme, collector) => {
 		collector.addRule(`.monaco-editor .find-widget.no-results .matchesCount { color: ${error}; }`);
 	}
 
-	let border = theme.getColor('panel.border');
+	let border = theme.getColor(editorWidgetBorder);
 	if (border) {
 		collector.addRule(`.monaco-editor .find-widget .monaco-sash { background-color: ${border}; width: 3px !important; margin-left: -4px;}`);
 	}