advance shell integration and session support

shell/ferese-shell/assets/icons/overview.svg

@@ -0,0 +1,6 @@
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+  <rect x="1.5" y="10.8" width="7.2" height="7.2" rx="1.7"/>
+  <rect x="11.3" y="13.8" width="7.2" height="4.2" rx="1.7"/>
+</svg>