UI rearrangement

Moved color mode (rgb/grayscale) button and channel selection
buttons from the left-hand side of the preview to below
the preview.
Moved color picker out of the popup menu
Just did some clean up
Renamed some menu items and buttons
Removed unneccessary code
Fixed problem with greyscale button
Changed color picker button to label
Trim the end of the text of the ChannelButton if it doesn't fit
Added Copy/Paste (paste not working yet)
Implemented MetadataViewer paste action
Don't grey out channel buttons when set to grey scale
Disabled save button, if no annotate permission
Rearranged various buttons
Show 'forename surname' below user rendering settings thumbnail
Replaced collapsable JXTaskPane with plain JPanel (User settings)
Overhauled copy/paste again
Relocated 'live update' checkbox
Just did some clean up
Added button for launching full image viewer
Added ROI count label