Build 1590

Sometimes applicability condition for the Delete operation was not executed
Displaying URL in main window didn't work if there were no tabs
Search on Unicode characters didn't work
& symbol was converted to & during inline editing
Operation applicability for trees didn't work
European characters were not accepted in item rules
Charts with series containing several bars were not displayed properly
Display window expressions with multiple lines caused Google Maps not to be displayed
Progress bar for import didn't work

Performance optimisation when retrieving references
Ability to wrap fields around for multi-attribute cells with 100% column width each

Bugs