Github: trim /files, /commits, etc. from the end of PR URLs

Signed-off-by: Laura Brehm <laurabrehm@hey.com>

Author: laurazard

src/handler/github/githubPRHandler.ts

@@ -3,14 +3,17 @@ import { renderIcon } from '../../common/icon';
 import { openDevEnv } from '../../utils/utils';
 import { Handler } from '../handler';
 
+const getPRURL = () =>
+  document.location.href.replace('/files', '').replace('/commits', '').replace('/checks', '').replace('/files', '');
+
 const renderButton = () => {
   const icon = renderIcon();
   const ourButton = document.createElement('button');
   ourButton.id = BUTTON_ID;
   ourButton.title = BUTTON_TITLE;
   ourButton.textContent = BUTTON_TEXT;
   ourButton.className = `${DEVENVS_BUTTON_STYLE} ${GITHUB_BUTTON_STYLE} btn btn-sm`;
-  ourButton.addEventListener('click', openDevEnv(document.location.href));
+  ourButton.addEventListener('click', openDevEnv(getPRURL()));
   ourButton.appendChild(icon);
 
   return ourButton;