FIX: use paging during options generation in edit mode

Summary

Implementation for https://gitlab.com/linkahead/linkahead-webui/-/issues/216

Focus

• Queries that retrieve entities that are candiates for drop down use paging.
• A Count Query identifies whether more enties would be available. If so, an option to enter an ID manually is included (a button ) and the dropdown shows a warning that it does not include all entities.

Test Environment

• manually test the behavior

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src/doc/tutorials/edit_mode.rst

@@ -80,7 +80,8 @@ might be available in the drop down element. In those cases, the drop down
 warns, that only a subset is shown and a new button with a pencil symbol is
 shown. This allows to enter an ID manually (Click the pencil button, enter the
 ID and press Enter). If you wonder how you find the ID of an entity: You can
-for example submit a SELECT query like this "SELCT ID FROM ..."
+see the ID of an Entity if you click on bar code icon in the upper right corner
+of the Entity card.
 
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