GNOME System Monitor 3.10 Beta 1 Fixes Numerous Bugs

GNOME System Monitor 3.10 Beta 1 is here to implement plural forms, add support for Kill/End process with multiple selection, filter process list, use a window-menu for the process page, uniformize usage of gsettings keys, as well as small improvements for the context menu. Moreover, the g_print function is now used instead of g_debug for printing debug messages, the application is now hidden when maximized, users are now able to double click a field to add/remove it in the preferences dialog, selections are now smartly handled in proctable when opening the context menu, the headerbar was transformed into a title bar, and system Monospace font is now used on Memmaps.