CSS classes renamed in v.3.0

Old class name	New class name
.dhx_unselectable	.gantt_unselectable
.dhx_cal_light	.gantt_cal_light
.dhx_cal_light_wide	.gantt_cal_light_wide
.dhx_mark	.gantt_mark
.dhx_cal_ltitle	.gantt_cal_ltitle
.dhx_cal_lsection	.gantt_cal_lsection
.dhx_fullday	.gantt_fullday
.dhx_cal_ltext	.gantt_cal_ltext
.dhx_time	.gantt_time
.dhx_title	.gantt_title
.dhx_cal_larea	.gantt_cal_larea
.dhx_btn_set	.gantt_btn_set
.dhx_save_btn	.gantt_save_btn
.dhx_cancel_btn	.gantt_cancel_btn
.dhx_delete_btn	.gantt_delete_btn
.dhx_cal_cover	.gantt_cal_cover
.dhx_custom_button	.gantt_custom_button
.dhx_wrap_section	.gantt_wrap_section
.dhx_section_time	.gantt_section_time
.dhx_cal_checkbox	.gantt_cal_checkbox
.dhx_repeat_right	.gantt_repeat_right
.dhx_cal_light_full	.gantt_cal_light_full
.dhx_cal_wide_checkbox	.gantt_cal_wide_checkbox
.dhx_cal_light input	.gantt_cal_light input
.dhx_time_selects	.gantt_time_selects
.dhx_gantt_duration	.gantt_duration
.dhx_gantt_duration_value	.gantt_duration_value
.dhx_gantt_duration_dec	.gantt_duration_dec
.dhx_gantt_duration_inc	.gantt_duration_inc