I did some cleaning up and fixing of some of the menu operation.
The zoom in/zoom out button could be used to alter the step size for MENUITEM_INT items.
The zoom in/out could also be held to control step size for both MENUITEM_INT and MENUITEM_ENUM items, but this was in conflict with the above operation, so I removed and modified.
zoom in/zoom out increases/decreases the step size: 1,10,100,1000,10000 for MENUITEM_INT, 1,3,9,27,81 for MENUITEM_ENUM.
I also extended the DISPLAY usage to all cameras. Now it alters the step size as per zoom out for both and recycles back to 1 at the top, so this can be used for cams without zoom button (I figured it may as well also extend to cams with zoom as well).
The step values are saved, so they don't reset back to 1 when moving around in the menu.
I also found the display of the step size at the top was inconsistent. it wouldn't clear itself when moving from item to item even though it had been changed. There were also some other display issues with it. Now it displays permanently and displays the stem to reflect the menuitem type (int or enum, for others it is blank).
The half-shoot was also used to be held for step size alteration. I modified it so it is a toggle (for all cams) that alters the step size by a factor of 1 or 2. it also updates the step size display above to reflect this change.
There were some other minor cleanup issues I did as well.
Please have a look at it and see if it is acceptable to be commited or if some alterations may be required.
*EDIT*
1. Slight error in the patch, I had one line from another item I was working on that would make it not work.
2. Made another addition to the menu operation. On the MISC tab there is now an item to select "Jogdial action". You can choose "KEY_U/D" (default) which is the previous operation, jogdial moves up/down menu items. Or you can select "KEY_L/R" and the jogdial will change values like the LEFT/RIGHT KEY operation. This have been enclosed with "#if CAM_HAS_JOGDIAL" so it's only included on cams with jogdials. State is also saved to config file.
