fix(terminal): use up-chevron for shell dropdown and 30px button width

Author: abose

src/extensionsIntegrated/Terminal/terminal-panel.html

@@ -11,7 +11,7 @@
                             <span class="terminal-btn-label">New Terminal</span>
                         </button>
                         <button class="terminal-flyout-dropdown-btn" title="Select Default Shell">
-                            <i class="fa-solid fa-chevron-down"></i>
+                            <i class="fa-solid fa-chevron-up"></i>
                         </button>
                     </div>
                     <div class="terminal-shell-dropdown forced-hidden"></div>

src/styles/Extn-Terminal.less

@@ -262,7 +262,7 @@
     display: none;
     align-items: center;
     justify-content: center;
-    width: 24px;
+    width: 30px;
     height: 100%;
     padding: 0;
     cursor: pointer;