Show Image hierarchy button in right-panel toolbar
'ROI Count' label fix
Show spinner while loading annotations dialog
More compact Add Comment form
Move 'Owner:' to 3rd row for Images
Move 'Owner:' to 3rd row for P/D/S/P/Tag
Add separator in toolbar info panel
Improved spinner for attachments dialog
Fix 'Add Comment' by delay in hiding button
Move 'Full viewer' button into right panel toolbar
Object ID and Owner labels consistent and aligned
Hierarchy icon missing from earlier commits
Initial conversion code via ctors

As described on openmicroscopy/ome-documenation#1041,
this enables converting from most enums of one unit
to another.
Use target unit during conversion
Fix 'Save to All' in Preview panel
Robot user_settings test Maximize Browser Window
Merge remote-tracking branch 'origin/develop' into general_pane_web_2

Conflicts:
	components/tools/OmeroWeb/omeroweb/webclient/templates/webclient/annotations/includes/name.html
Add a simple units tests for conversions
Add support for angstroms
Set unit on conversion