additional icon classes in metadata

.idea/jsonSchemas.xml

@@ -341,6 +341,25 @@
             </SchemaInfo>
           </value>
         </entry>
+        <entry key="metadata/app/clientIcons">
+          <value>
+            <SchemaInfo>
+              <option name="generatedName" value="New Schema" />
+              <option name="name" value="metadata/app/clientIcons" />
+              <option name="relativePathToSchema" value="schema/metadata/app/clientIcons.json" />
+              <option name="schemaVersion" value="JSON Schema version 7" />
+              <option name="patterns">
+                <list>
+                  <Item>
+                    <option name="pattern" value="true" />
+                    <option name="path" value="*/Resources/metadata/app/clientIcons.json" />
+                    <option name="mappingKind" value="Pattern" />
+                  </Item>
+                </list>
+              </option>
+            </SchemaInfo>
+          </value>
+        </entry>
         <entry key="metadata/app/clientRecord">
           <value>
             <SchemaInfo>

.vscode/settings.json

@@ -190,6 +190,12 @@
             ],
             "url": "./schema/metadata/app/client.json"
         },
+        {
+            "fileMatch": [
+                "*/Resources/metadata/app/clientIcons.json"
+            ],
+            "url": "./schema/metadata/app/clientIcons.json"
+        },
         {
             "fileMatch": [
                 "*/Resources/metadata/app/clientRecord.json"

application/Espo/Resources/metadata/app/clientIcons.json

@@ -0,0 +1,3 @@
+{
+    "classList": []
+}

client/src/views/admin/entity-manager/modals/select-icon.js

@@ -1611,6 +1611,8 @@ export default class extends ModalView {
             "far fa-window-minimize",
             "far fa-window-restore"
         ];
+
+        this.iconList.push(...this.getMetadata().get('app.clientIcons.classList', []));
     }
 
     // noinspection JSUnusedGlobalSymbols

schema/metadata/app/clientIcons.json

@@ -0,0 +1,19 @@
+{
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$id": "https://www.espocrm.com/schema/metadata/app/clientIcons.json",
+    "title": "app/icons",
+    "description": "Client icons.",
+    "type": "object",
+    "properties": {
+        "classList": {
+            "description": "Icon classes.",
+            "type": "array",
+            "items": {
+                "anyOf": [
+                    {"type": "string"},
+                    {"enum": ["__APPEND__"]}
+                ]
+            }
+        }
+    }
+}