Register rewrite Update, bug fixes and transaction commit changes.

This update fixes the following, adds commit of transaction by change of transaction by cursor keys with some changes to used functions, added commit of transaction by enter, corrects the default behaviour for share/price/value changes, changed the account accelerator function, fixed a scrolling issue, fixed column resizing, changed treeview to fixed height mode.
Author: Robert Fewell

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22994 57a11ea4-9604-0410-9ed3-97b8803252fd