To get movable/dockable popups in WAB Developer's Edition, here are some resources I've gathered to look into:
(The most notable is https://community.esri.com/thread/161401 with a comment by:
Tyler DunnMar 18, 2016 10:05 AM)
https://community.esri.com/thread/161401
Move the popup widow in WAB
Question asked by George Katsambas on Jun 30, 2015
http://jsfiddle.net/goldenlimit/gaz8ao8n/
Nathan Wu
Esri − Redlands
https://community.esri.com/thread/122195
How do I edit pop-up size and location?
Question asked by Brandon Keinath on Feb 20, 2015
https://community.esri.com/thread/152418
Re: How do I edit pop-up size and location?
Question asked by Jeff Hyder on Apr 24, 2015
https://community.esri.com/thread/121418
WAB - popup box inconsistent sizes
Question asked by Stan McShinsky Champion on Feb 9, 2015
https://support.esri.com/en/technical-article/000014327
How To: Change the size of a popup in Web AppBuilder for ArcGIS
https://community.esri.com/ideas/6477
Movable popup window in ArcGis Online
Idea created by Eric Svensen on Oct 22, 2012
https://community.esri.com/ideas/16719-popup-interface-design-tabs-to-page-through-multiple-features
popup interface design - Tabs to page through multiple features
Idea created by Kevin MacLeod on May 21, 2019
https://community.esri.com/thread/106181
Display popup info windows in two tabs
Question asked by ryannz on Aug 7, 2014
https://community.esri.com/thread/60217
Multipage InfoPopup
Question asked by Jackson Trappett on Sep 28, 2012
Does this using deprecated flex.
https://community.esri.com/ideas/4590
Auto-size/Customize width of ArcGIS.com map popups
Idea created by Owen Evans Employee on Nov 4, 2011
https://community.esri.com/thread/223080-draggable-popup-template
draggable popup template?
Question asked by Jared Pilbeam on Oct 19, 2018
https://gis.stackexchange.com/questions/32336/how-to-make-openlayers-popup-draggable
How to make OpenLayers.Popup draggable?
https://gis.stackexchange.com/questions/201261/arcgis-online-floating-pop-ups-in-web-map
ArcGIS Online - floating pop-ups in web map
http://aamirafridi.com/openlayers/openlayers-draggable-popups
Openlayers draggable popups
https://medium.com/@quarticsolutions/draggable-popups-with-angular-and-arcgis-api-for-javascript-4-x...
Draggable Popups with Angular and ArcGIS API for Javascript 4.x
https://community.esri.com/groups/geodev/blog/2017/06/23/arcgis-api-for-javascript-4x-dockable-popup...
ArcGIS API for JavaScript 4.x Dockable Popups Offer Great Flexibility
Blog Post created by Andy Gup on Jun 23, 2017
ESRI Resources:
https://developers.arcgis.com/javascript/3/jssamples/query_hoverinfowindow.html
Show info window on mouse hover
https://developers.arcgis.com/javascript/3/jssamples/popup_sidepanel.html
Popup content in side panel
https://developers.arcgis.com/javascript/3/jssamples/widget_infowindowchart.html
Info window with chart
https://developers.arcgis.com/javascript/3/jssamples/layout_MapContainerSplitLeft.html
Map container split left
https://developers.arcgis.com/javascript/latest/sample-code/popup-docking-position/index.html
Popup dock positions
https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-Popup.html#dockOptions
dockOptions Object
https://developers.arcgis.com/javascript/latest/api-reference/esri-views-View.html#popup
popup Popupautocast
https://developers.arcgis.com/javascript/latest/sample-code/intro-popup/index.html
Intro to popups
General Resources:
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout
CSS Grid Layout
https://www.w3schools.com/howto/howto_js_draggable.asp
How TO - Create a Draggable HTML Element
