sidebar: Use GtkGrid, adjustments & mnemonic wdgts in SidebarGraphicPanel.
sidebar: Use GtkGrid, adjustments & mnemonic wdgts in SidebarGraphicPanel.

Change-Id: I1f06733e292986ed0136837ccd6e3a5ba48d07bd

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core