When displaying a link field, the combobox is always querying the dataset size

Steps to reproduce

• Log tools (you may hit LOGTOOLS-21, that is unrelated), change to debug: info.magnolia.dam.jcr.JcrAssetProvider
• Pages app: create a new page using basic template
• Include a text and image component
• Change to Image tab
• Check the logs

  2020-11-17 16:56:18,419 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Running SQL2 query 'SELECT * FROM [nt:base] AS asset WHERE (NOT asset.[mgnl:deleted] IS NOT NULL) AND asset.[jcr:primaryType] = 'mgnl:asset'' against workspace dam.
  2020-11-17 16:56:18,433 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/11219108004_604a12df22_o.jpeg'
  2020-11-17 16:56:18,435 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/11219108435_a41740babe_o.jpeg'
  2020-11-17 16:56:18,436 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/14518293372_77d06a17fb_o.png'
  2020-11-17 16:56:18,436 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/31261019086_f4438ae8aa_o.jpeg'
  2020-11-17 16:56:18,436 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/IMG-20170622-WA0006.jpg'
  2020-11-17 16:56:18,436 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/IMG_0822.jpeg'
  2020-11-17 16:56:18,436 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/team-bike.png'
  2020-11-17 16:56:18,436 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/secret-santa-2016_31180868041_o.jpeg'
  2020-11-17 16:56:18,436 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/dinner.jpeg'
  2020-11-17 16:56:18,437 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Running SQL2 query 'SELECT * FROM [nt:base] AS asset WHERE (NOT asset.[mgnl:deleted] IS NOT NULL) AND asset.[jcr:primaryType] = 'mgnl:asset'' against workspace dam.
  2020-11-17 16:56:18,439 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/11219108004_604a12df22_o.jpeg'
  2020-11-17 16:56:18,439 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/11219108435_a41740babe_o.jpeg'
  2020-11-17 16:56:18,440 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/14518293372_77d06a17fb_o.png'
  2020-11-17 16:56:18,440 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/31261019086_f4438ae8aa_o.jpeg'
  2020-11-17 16:56:18,440 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/IMG-20170622-WA0006.jpg'
  2020-11-17 16:56:18,440 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/IMG_0822.jpeg'
  2020-11-17 16:56:18,440 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/team-bike.png'
  2020-11-17 16:56:18,440 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/secret-santa-2016_31180868041_o.jpeg'
  2020-11-17 16:56:18,440 DEBUG info.magnolia.dam.jcr.JcrAssetProvider      : Created asset linked to the following node '/untitled/dinner.jpeg'
  

Expected result

Not querying the whole workspace when generating the dialog

Current result

A query is done to get dataset size.

Development notes

If you include a breakpoint in info.magnolia.dam.jcr.JcrAssetProvider.list(AssetQuery), you can see the following stack:

Currently, linkField uses a combobox to display the item path (used to be a textfield) and the combobox may cause troubles due to since it might not be using the lazy loading. It might be usefull to replace combobox solution with something simpler and less intrusive.
Vaadin combobox will try to get the dataset size even if paging is enabled