Fix #78149, make icons the same pixel width

src/vs/workbench/contrib/extensions/browser/media/profile-start-dark.svg

 <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
-<g clip-path="url(#clip0)">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M8 14C11.3137 14 14 11.3137 14 8C14 4.68629 11.3137 2 8 2C4.68629 2 2 4.68629 2 8C2 11.3137 4.68629 14 8 14ZM11.9139 8C11.9139 10.1616 10.1616 11.9139 8 11.9139C5.83839 11.9139 4.08606 10.1616 4.08606 8C4.08606 5.83839 5.83839 4.08606 8 4.08606C10.1616 4.08606 11.9139 5.83839 11.9139 8ZM8 3.86919C10.2814 3.86919 12.1308 5.71862 12.1308 8C12.1308 8.00001 12.1308 8 12.1308 8C12.1308 5.71862 10.2814 3.86919 8 3.86919Z" fill="#848484"/>
-</g>
-<defs>
-<clipPath id="clip0">
-<rect width="16" height="16" fill="white"/>
-</clipPath>
-</defs>
+<circle cx="8" cy="8" r="5.5" stroke="#C5C5C5"/>
+<circle cx="8" cy="8" r="2" fill="#C5C5C5"/>
 </svg>

src/vs/workbench/contrib/extensions/browser/media/profile-start-light.svg

 <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
-<g clip-path="url(#clip0)">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M8 14C11.3137 14 14 11.3137 14 8C14 4.68629 11.3137 2 8 2C4.68629 2 2 4.68629 2 8C2 11.3137 4.68629 14 8 14ZM11.9139 8C11.9139 10.1616 10.1616 11.9139 8 11.9139C5.83839 11.9139 4.08606 10.1616 4.08606 8C4.08606 5.83839 5.83839 4.08606 8 4.08606C10.1616 4.08606 11.9139 5.83839 11.9139 8ZM8 3.86919C10.2814 3.86919 12.1308 5.71862 12.1308 8C12.1308 8.00001 12.1308 8 12.1308 8C12.1308 5.71862 10.2814 3.86919 8 3.86919Z" fill="#848484"/>
-</g>
-<defs>
-<clipPath id="clip0">
-<rect width="16" height="16" fill="white"/>
-</clipPath>
-</defs>
+<circle cx="8" cy="8" r="5.5" stroke="#424242"/>
+<circle cx="8" cy="8" r="2" fill="#424242"/>
 </svg>

src/vs/workbench/contrib/extensions/browser/media/start-dark.svg

 <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M3.99977 14V2.18091L12.9998 8.06215L3.99977 14ZM5.5 4.99997L10.3145 8.06215L5.5 11.1809L5.5 4.99997Z" fill="#89D185"/>
+<path fill-rule="evenodd" clip-rule="evenodd" d="M4 2V14.4805L12.9146 8.24024L4 2ZM11.1809 8.24024L4.995 12.5684V3.91209L11.1809 8.24024Z" fill="#C5C5C5"/>
 </svg>

src/vs/workbench/contrib/extensions/browser/media/start-light.svg

 <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M3.99977 14V2.18091L12.9998 8.06215L3.99977 14ZM5.5 4.99997L10.3145 8.06215L5.5 11.1809L5.5 4.99997Z" fill="#388A34"/>
+<path fill-rule="evenodd" clip-rule="evenodd" d="M4 2V14.4805L12.9146 8.24024L4 2ZM11.1809 8.24024L4.995 12.5684V3.91209L11.1809 8.24024Z" fill="#424242"/>
 </svg>