fix: symbolic icon size

Normalizes symbolic icon sizes to 16x16 to match designs.

freedesktop/scalable/categories/applications-accessibility-symbolic.svg

@@ -1,4 +1,4 @@
-<svg width="17" height="17" viewBox="0 0 17 17" fill="none" xmlns="http://www.w3.org/2000/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_515_3695)">
 <path d="M8 0C5.87827 0 3.84344 0.842855 2.34315 2.34315C0.842855 3.84344 0 5.87827 0 8C0 10.1217 0.842855 12.1566 2.34315 13.6569C3.84344 15.1571 5.87827 16 8 16C10.1217 16 12.1566 15.1571 13.6569 13.6569C15.1571 12.1566 16 10.1217 16 8C16 5.87827 15.1571 3.84344 13.6569 2.34315C12.1566 0.842855 10.1217 0 8 0V0ZM7.969 1C8.23164 1 8.49172 1.05173 8.73437 1.15224C8.97702 1.25275 9.1975 1.40007 9.38321 1.58579C9.56893 1.7715 9.71625 1.99198 9.81676 2.23463C9.91727 2.47728 9.969 2.73736 9.969 3C9.969 3.53043 9.75829 4.03914 9.38321 4.41421C9.00814 4.78929 8.49943 5 7.969 5C7.43857 5 6.92986 4.78929 6.55479 4.41421C6.17971 4.03914 5.969 3.53043 5.969 3C5.969 2.46957 6.17971 1.96086 6.55479 1.58579C6.92986 1.21071 7.43857 1 7.969 1ZM2.469 6H13.469V8H10.469V14H8.469V10H7.469V14H5.469V8H2.469V6Z" fill="#232323"/>
 </g>

freedesktop/scalable/categories/system-help-symbolic.svg

@@ -1,3 +1,3 @@
-<svg width="16" height="17" viewBox="0 0 16 17" fill="none" xmlns="http://www.w3.org/2000/svg">
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
 <path d="M9 15.0031H7V13.0031H9V15.0031ZM11.07 7.25305L10.17 8.17305C9.45 8.90305 9 9.50305 9 11.0031H7V10.5031C7 9.40305 7.45 8.40305 8.17 7.67305L9.41 6.41305C9.78 6.05305 10 5.55305 10 5.00305C10 3.90305 9.1 3.00305 8 3.00305C6.9 3.00305 6 3.90305 6 5.00305H4C4 2.79305 5.79 1.00305 8 1.00305C10.21 1.00305 12 2.79305 12 5.00305C12 5.88305 11.64 6.68305 11.07 7.25305Z" fill="#232323"/>
 </svg>