1) Added special handling for the extension to resolve the dependency.

2) Added 'is_sys_obj' to the ignore list of Schema Diff.
3) Font awesome v5 fixes.

web/pgadmin/tools/datagrid/static/js/datagrid_panel_title.js

@@ -45,7 +45,7 @@ export function setQueryToolDockerTitle(panel, is_query_tool, panel_title, is_fi
   else if (is_query_tool == 'false' || is_query_tool == false) {
     // Edit grid titles
     panel_tooltip = gettext('View/Edit Data - ') + panel_title;
-    panel_icon = 'fa fa-table';
+    panel_icon = 'pg-font-icon icon-view-data';
   } else {
     // Query tool titles
     panel_tooltip = gettext('Query Tool - ') + panel_title;

web/pgadmin/tools/schema_diff/compare.py

@@ -19,7 +19,7 @@ from pgadmin.tools.schema_diff.directory_compare import compare_dictionaries
 
 class SchemaDiffObjectCompare:
 
-    keys_to_ignore = ['oid', 'oid-2']
+    keys_to_ignore = ['oid', 'oid-2', 'is_sys_obj']
 
     @staticmethod
     def get_schema(sid, did, scid):

web/pgadmin/tools/schema_diff/static/js/schema_diff_dependency.js

@@ -135,6 +135,11 @@ function selectDependencies(data, isChecked) {
   }
 
   setDependencies = function(rowData, dependencies, isChecked) {
+    // Special handling for extension, if extension is present in the
+    // dependency list then iterate and select only extension node.
+    let extensions = dependencies.filter(item => item.type  == 'extension');
+    if (extensions.length > 0) dependencies = extensions;
+
     _.each(dependencies, function(dependency) {
       if (dependency.length == 0) return;
       let dependencyData = [];