New features

Added the possibility to change the voice when changing the grid language. The action to set the grid content language has been renamed to Change content language / voice and now also allows to define a voice, see #208
There is a new action Set navigation for grid elements in edit mode, where it's possible to either define a navigation to a new grid or to an existing one. This makes it much easer to create configurations with many grids linked to each other, see #193

Bugfixes

The height of the global grid now should always be constant. Before it sometimes changed while navigating.
Fixed bug within pictogram search (ARASAAC and opensymbols.org) where sometimes not all pictograms were displayed.

Added new Galician grid configuration of the ARASAAC communicator
Added new grid configuration for hospital context, created by Dachverband der Wiener Sozialeinrichtungen
Acoustic feedback options have been removed from settings page, and are now only accessible within the settings of the input options (accordion "General input settings")
Contact info has been updated and moved to the "Help" page
Accessibility improvements:
- used appendTo property of jquery context menu in order to append context menus ("more" buttons, input options) at the correct position in the document in order to be read by screen readers.
- made the new modal for "set navigation" (see above) accessible for screen readers by setting correct properties and focus, still has to be done for other modals, see #210