Add password widget and solid-map cluster option

Add solid-form-password widget, solid-map clustering attribute (and autosave in list attributes).

source/import_documentation/Components/Solid-Map.rst

@@ -52,6 +52,8 @@ added to interact with the list of data being displayed.
 
 ``clustering``
 ~~~~~~~~~~~~~~
+  *Available from version 0.16*
+
   If this attribute is defined, markers spacially close are grouped in clusters.
 
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