Update to version 5.0.4

Changelog:

• change: win32: upgraded to gtk+ 3.16
• change: amount toggle sign button changed from text button to entry icon
• change: added/changed transaction are always showed by default filter
• bugfix: #1492634 using memo filter does not list memos in split catagories
• bugfix: #1475969 no help file. F1 does nothing. Windows 10
• bugfix: #1473717 year on statistics is preset to 1900 instead of e.g. current year
• bugfix: #1464961 inconsistency in internal xfer
• bugfix: #1391506 win32: (gtk3.6.4 bug) Dropdown list appear on the wrong Screen (dualscreen)
• wish : #1469424 bank Account window should remember user column arrangement
• wish : #1338052 add option to show x days future ledger txn
• wish : #1330156 in the ledger, a way to identify graphically the past from the future.