[ADD] web_widget_dropdown_dynamic

[UPD] Update web_widget_dropdown_dynamic.pot

[UPD] Update web_widget_dropdown_dynamic_example.pot

[UPD] README.rst

[ADD] icon.png

[UPD] README.rst

web_widget_dropdown_dynamic/readme/USAGE.rst

@@ -0,0 +1,24 @@
+.. code-block:: python
+
+    @api.model
+    def method_name(self):
+        values = [
+            ('value_a', 'Title A'),
+        ]
+        if self.env.context.get('depending_on') == True:
+            values += [
+                ('value_b', 'Title B'),
+            ]
+        return values
+
+.. code-block:: xml
+
+    <field
+        name="other_field"
+    />
+    <field
+        name="char_field"
+        widget="dynamic_dropdown"
+        values="method_name"
+        context="{'depending_on': other_field}"
+    />