feat: improve existing monochrome icons and add new ones, p=#10536

src/zen/workspaces/create-workspace-form.css

@@ -70,6 +70,8 @@ zen-workspace-creation {
 
           & image {
             position: absolute;
+            width: 16px;
+            height: 16px;
             -moz-context-properties: fill-opacity, fill;
             fill: currentColor;
           }

src/zen/workspaces/zen-workspaces.css

@@ -43,11 +43,13 @@
     fill-opacity: 0.6;
 
     & .zen-workspace-icon {
+      padding: 6px;
       pointer-events: none;
    
       &[no-icon='true'] {
         width: 6px;
         height: 6px;
+        padding: 0;
         background: light-dark(rgba(0, 0, 0, 0.4), rgba(255, 255, 255, 0.4));
         border-radius: 50%;
       }