Fix to DNN List Edit Control coercing of old value
remove duplicate dot.
DNN-6234 - removed internal set to allow unit testing
DNN-6239: fix for owner and qualifier names.
Fixes for ( DNN-6239 ) AND ( DNN-6218 + DNN-6242 ).

DNN-6239: Upgrade is failing.
DNN-6218 + DNN-6242: DB logging provider throws errors
DNN-6090: fixed thrown error when there are more items in collections (SingleOrDefault replaced with FirstOrDefault).
DNN-6244 Change Gravity Skin Link to point to Community page
DNN-6250 fix compilation warnings in clientAPI
dnn-6249 fixed cls compliance issue by renaming the newly created proprty from "keywords" to "customkeywords"
DNN-6166 More changes from "skin" to "theme"
DNN-6246 - Added support for the IsSystem field.
System Tabs are excluded from Localization
System Tabs are explucded from Sitemap
System Tabs are excluded from Site Templates
DNN-6246 - Page Picker does not show System Tabs
Merge branch bdukes/DNN-6166 into development with small modification to one text
Merge pull request #233 from donker/DNN-6236

Fix to DNN List Edit Control coercing of old value
DNN-6240: fix for Violation of PRIMARY KEY constraint 'PK_dnn_Exceptions'

The fix contains a performance improvement as well: using BASE64 for byte conversion instead of iterating and concatenating HEX formatted values to a string.
DNN-6218 + DNN-6242: another fix for DB logging provider throws errors.
DNN-6254 - Added Folders to Workflow usage, and check Default Tab worklfow when Tabs has not workflow state
Added WorkUsageItem entity to list Workflow usage
DNN-6246 - Fixed Tests to work with System Tabs
performance updates in purge schedule history

It seems the old script doesn't work too well. This change reduces the time to clear the history table with 465k rows by 97%. However, because it limited to 50k rows per execution, it will take multiple days to fully clean up the scheduled history table. 

Total Rows: 465k
Default Query: 3992 seconds (1hr 6m 32s)
Optimized (all at once): 96 seconds
100k batches: 143 seconds total, 5 runs (14, 34, 35, 31, 29)
50k batches: 94 seconds total, 10 runs (6, 6, 11, 7, 8, 8, 10, 14, 20, 5)
DNN-6261: add localization string for connector.