New features:

added feature for checking last version -> user will be informed if there is newer version (can be controlled via preferences)
changes in tree search and SQL console search
marking usage of nodes - when database/table is loaded - is marked in tree with different font of tree node label
when filtering tree, connection nodes are ignored (always shown)
added collapse action on connection node


Some other changes: sort click on tabledatatable header - change to left click (before was right)

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