Sonic Visualiser updated to v1.7.1

Sonic Visualiser has been updated to v1.7.1.

Changes:

• The RDF importer does a better job of assigning labels to layers, layers to panes, and values to labelled regions.
• Interactive editing in the Text layer benefits from the same improvements as made in 1.7 to Note and Region layers.
• The layer data editor window has a text search feature.
• The main window status bar now shows the last label to have passed the playback position in the current layer, at the right end of the status bar.
• The Russian translation has been updated.