Epic: VCell UI fixes

[jcschaff]

Motivation

• user interface bugs place VCell in a bad light - leading the user to judge the quality of the underlying product with suspicion.

Completion Criteria

• all VCell UI bugs that are likely to be encountered should be fixed or otherwise accommodated (e.g. remove functionality)
• all VCell UI enhancements implemented or moved to other Epics.

Tasks (bugs)

• [ ] #146
• [x] #150
• [x] #157
• [ ] #176
• [ ] #179
• [ ] #183
• [ ] #194
• [x] #203
• [ ] #289
• [ ] #290
• [ ] #304
• [ ] #429
• [ ] #574
• [ ] #575
• [ ] #611
• [ ] #772
• [ ] #792
• [ ] #832
• [ ] #858
• [x] #869
• [ ] #898
• [x] #936
• [ ] #950
• [ ] #1024
• [ ]

Tasks (minor enhancements)

• [ ] #153
• [x] #154
• [ ] #175
• [ ] #182
• [ ] #184
• [ ] #187
• [ ] #181
• [ ] #214
• [x] #219
• [ ] #221
• [ ] #222
• [ ] #223
• [ ] #224
• [ ] #225
• [x] #751
• [ ] #752
• [ ] #835
• [ ]

Tasks (major enhancements)

• [ ] #191
• [ ] #648
• [ ] #805
• [ ]