Inst view: Share "drawing tools between Pick and Mask/group tabs

[NickDraper]

The selection in the pick tab is somewhat lacking compared to the mask/group tab.

• use the mask/group tab drawing tools on the pick tab.
  • Add the rubber box to the buttons for the mask/group it should remove a selection "box" if clicked on it, or if one not present remove peaks, or nothing.
  • The pick tab will also have the remaining 3 buttons (select single, bank,single crystal) as a second layer of buttons.
  • The image for move instrument in the mask/group controls needs to change.
  • Add the Tool:description label to the mask/group tab
  • Boxes created on one tab should remain and be functional on the other. You might want to pick another colour for the border for the pick tab.
• "Boxes" on the pick tab should sum all of the spectra and show it on the miniplot.
  • The miniplot should update as frequently as is reasonable (while moving or resizing of boxes, of after).
  • The miniplot will need to refresh if the instrument is moved or zoomed
• Remove the current rubber band functionality on the Pixel selection tool

[NickDraper]

This issue was originally trac ticket 7222