Rename DataGridView variables. Introduce properties and remove hard coded indices to get columns
Use names instead of bare numbers for column referencing.
Add new column IsMultilineMessage (experimental, cached, thread)
Add thread safety
Move [...] column after message column
Make ShowIndicatorForMultilineMessage a View option (false by default)
Merge pull request #1980 from feinstaub/dev/refactor_for_#1343

Refactoring to support implementation of #1343
Merge branch 'pr/n1985_feinstaub'
IsArtificial