add .disable-bold to xterm.css

src/vs/workbench/parts/terminal/electron-browser/media/xterm.css

@@ -2164,3 +2164,7 @@
 .monaco-workbench .panel.integrated-terminal .xterm .xterm-bg-color-255 {
 	background-color: #eeeeee;
 }
+
+.disable-bold{
+	font-weight: normal;
+}
\ No newline at end of file

src/vs/workbench/parts/terminal/electron-browser/terminalPanel.ts

@@ -55,6 +55,7 @@ export class TerminalPanel extends Panel {
 
 		this._terminalContainer = document.createElement('div');
 		DOM.addClass(this._terminalContainer, 'terminal-outer-container');
+		DOM.toggleClass(this._parentDomElement, 'disable-bold', !this._terminalService.configHelper.config.enableBold);
 		this._parentDomElement.appendChild(this._themeStyleElement);
 		this._parentDomElement.appendChild(this._fontStyleElement);
 		this._parentDomElement.appendChild(this._terminalContainer);