Bug 1640234 - Disabled browser_application_panel_target-switching.js on Linux and Windows. r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D80431

devtools/client/application/test/browser/browser.ini

@@ -60,3 +60,4 @@ skip-if = asan || debug || !serviceworker_e10s # Bug 1559487, 1559591, 1608640
 skip-if = true # Bug 1467256, 1559591
 [browser_application_panel_sidebar.js]
 [browser_application_panel_target-switching.js]
+skip-if = (os == 'win') || (os == 'linux') # Bug 1640234