Several fixes during CCP4 - DLS workshop

Changes in 2019.12:

Several fixes during CCP4 - DLS workshop

• Several compatibility issues with any Dials 2.0.X version
• Image viewer goes back to normal when DUI is running a command
• Simplified and more stable widget for advanced parameters

final candidate for CCP4 - DLS workshop

Changes in 2019.11.1:

Final candidate for CCP4 - DLS workshop

• Parameters updated for Dials 2.0.1
• Cleaner prints to console

Candidate for CCP4 - DLS workshop

Changes in 2019.11:

Candidate for CCP4 - DLS workshop

• Image viewer with previews that aid how to do spot-finding
• More compatibility with Dials 2.0

2019.10.2 First spin for Dials 2.0

Changes in 2019.10.2:

Same as 2019.10.1 but ready for Dials 2.0

• removing one annoying not needed pop-up
• Fixing compatibility with Gui2