code cleanup gantt_helper.rb
Merged r11014 from trunk to 1.4-stable (#12605)
Norwegian translation for 1.4-stable updated by Ketil Mehl.
Merged r11014 from trunk to 2.1-stable (#12605)
Merged r11015 from trunk to 2.2-stable (#12605, #12608)
Norwegian translation changed by Ketil Mehl.
Merged r11014 from trunk to 2.2-stable (#12605)
Merged r11012 from trunk to 2.2-stable (#12607)
Japanese translation for 2.2-stable updated.
Norwegian translation changed by Ketil Mehl (#12605, #12608)
Norwegian translation for 1.4-stable updated by Ketil Mehl (#12605)
Japanese translation updated by Go MAEDA (#12606)
Japanese translation for 2.2-stable updated (#12607)