Rois tab ui reshuffle and styling

[waxenegger]

see: ome/design#75

• roi/shapes table: rearranged columns, border transparent instead of black
• delete is now a button (not dropdown) and next to edit dropdown acting like other edit widgets on selection
• show roi toggle was already visually removed in Info tab #55 but now internal flag was removed and along with it a refactoring was done
• all entries in the rois table will be hidden by a checkbox on the header
• spacing for drawing menu icons was altered to give more space between select and rest of icons
• although not rois tab related the remaining code for the scalbar toggle got removed (after: scalebar - increase spectrum (finer unit differentiation) #54)
• 3 fixes: delete of multiple shapes, modify circle ignoring attachment, no canvas redraw on panel collapse
• rois backend request made on demand (first click on tab)
• change of default selection style and fill color

[snoopycrimecop]

Conflicting PR. Removed from build iviewer-merge#252. See the console output for more details.
Possible conflicts:

• PR Luts - png follow up #50 waxenegger 'Luts - png follow up'
  • src/utils/constants.js

[snoopycrimecop]

Conflicting PR. Removed from build iviewer-merge#266. See the console output for more details.
Possible conflicts:

• PR OL3 style changes for controls (esp. zoom) #56 waxenegger 'OL3 style changes for controls (esp. zoom)'
  • src/css/app.css

[waxenegger]

@jburel and @will-moore:

I'm going to list this PR for review despite the inline comment edit not being in there. That's something I wanted to discuss again since it would behave differently (acts on multiple selection actions at the moment), would have different (font) size/length in terms of input field for the row and last but not least only work if I disallowed selection of a row along the comment column.

But there is already enough in this PR to justify a review and there is another one waiting for the channel settings (#58) for which I'm going to have to touch css again.

[will-moore]

• ROI table looks good
• Delete working as expected
• Show/hide toggles are behaving fine, Show/hide ALL is good too.
• Layout of drawing icons looks nice.
• ROIs are only loaded when the ROIs tab is selected
• Default stroke/fill colours are yellow/transparent as expected.

Functionality is all good ;).
Ready to merge for me.

[jburel]

If I click Edit>Select All, the UI is removed from the ROIs tab.

[waxenegger]

@jburel the last commit should fix that. seems we noticed that about the same time.

[jburel]

The problem is now fixed. Merging