Release 2019.05

These are the major changes that are part of the release in May 2019:

• Create an adjustment batch for a posted Gift batch
• Export Gift batches to Excel file
• Show total amount, and amounts of gifts for the Gift batch
• Avoid editing posted/read only Gift batches.
• Fixes for closing month/period, improved UI showing the dates of the current period.
• In the background, much of the code was refactored to not reuse database connections across a user session, but for each request a new database connection is opened. This is how it should be done nowadays.

For more details, see the issues closed in this release: Issues closed in Milestone 2019.05