Ticket #423 Added custom solution for characters "ä,ö,ü" in is_lowercase and is_uppercase
Fixed some small issues in different locations
Fixed an issue in implementation of ticket #13 Resolved a substring exception, if a cluster shall be plotted.
Added the "normalize()" function to implementation of ticket #396
Improved mouse behavior in ticket #371
Fixed an issue in implementation of ticket #320 Placeholders are now detected correctly.
Fixed an issue in implementation of ticket #458 The alpha value was defined erroneously.
Fixed a critical issue in the newly introduced file watcher handling introduced with ticket #397
Added fixes for ticket #466
Deleted merged branch for ticket #397