Dear Users, 
I would like to post about the new feature provided with our latest upgrade in Jun2019 in case if it is not being not noticed by some of the users. We can now retain the "maximized" query panel size so that you don't need to resize the query panel each time for editing the query. We can also hide/unhide Data Preview, Data outline (universe columns) and Filters Panes. Check the attachment for more information.
Please note that this feature works only in Preferences->WebI-> View/Modify-> HTML Mode