Preserve order of Tag_IDs
Fix tiny bug in Max_Columns with <div> tag subsets
Merge pull request #1003 from snoopycrimecop/merge/dev_4_4/submodules

Update dev_4_4 submodules
Add MAX_RETRIEVAL constant to specify maximum number of thumbnails
Handle case where not thumbnail is read in getThumbnail*Set() methods

If byteArray is empty, the thumbnail field of the corresponding element is
filled with an empty array.
Merge pull request #1001 from jburel/tilesize

Tilesize
Merge pull request #993 from mtbc/overriden-spelling

Restore 3rd-party "overriden" misspelling.
Handle up/down clicks on Max_Columns
If no images are Tagged, show message instead of Tag filter
If no Tags Chosen, return to initial layout
Revert "Change error responses to 404 in query API"

This reverts commit 1f3f8d1354444445a23c337be315252c156b9e01.

Per suggestion from will-moore, removing 404 responses from AJAX calls
and returning a dictionary with an error field instead.
Merge pull request #981 from scottlittlewood/insight-import-as-ui-dev-4-4

Insight Import As
Adding webgallery to INSTALLED_APPS
Adding 'Gallery' link to TOP_LINKS in omeroweb/settings.py
merge dev_4_4 -D org -I include -E exclude: PR 821 (Connection)
merge dev_4_4 -D org -I include -E exclude: PR 971 (OMERO.matlab: add function to retrieve thumbnails (see #10384))
merge dev_4_4 -D org -I include -E exclude: PR 980 (Big image zoom init 8475)
merge dev_4_4 -D org -I include -E exclude: PR 982 (Add support for Ice 3.5)
merge dev_4_4 -D org -I include -E exclude: PR 988 (webgallery prototype from github/will-moore/webgallery)
merge dev_4_4 -D org -I include -E exclude: PR 1002 (Thumbnail figure)