Add missing DRAG.DROP event if transfer flavor is not supported

[LinqLover]

Fixes #125.

[codecov[bot]]

Codecov Report

Merging #126 into master will decrease coverage by 0.01%. The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master     #126      +/-   ##
============================================
- Coverage     55.07%   55.05%   -0.02%     
+ Complexity     3403     3401       -2     
============================================
  Files           208      208              
  Lines         21193    21195       +2     
  Branches       3122     3122              
============================================
- Hits          11671    11669       -2     
- Misses         8119     8121       +2     
- Partials       1403     1405       +2     

Impacted Files	Coverage Δ	Complexity Δ
...src/de/hpi/swa/trufflesqueak/io/SqueakDisplay.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...pi/swa/trufflesqueak/model/LargeIntegerObject.java	63.49% <0.00%> (-0.80%)	107.00% <0.00%> (-1.00%)
...rc/de/hpi/swa/trufflesqueak/nodes/plugins/Zip.java	63.87% <0.00%> (-0.27%)	78.00% <0.00%> (-1.00%)
...queak/nodes/process/RemoveProcessFromListNode.java	88.46% <0.00%> (+3.84%)	7.00% <0.00%> (ø%)

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[LinqLover]

@fniephaus The coverage job failed with a configuration error. How can I fix that? :-)

[fniephaus]

Don't worry about it, I'll fix it next week. Thank you for the contribution!

[LinqLover]

@fniephaus Thanks for the fast feedback! Have a nice weekend :-)

[fniephaus]

Thanks for improving TruffleSqueak. Enjoy your weekend!