Copy as HTML crash

[alexwhitman]

Attempting to use the Copy as HTML function on Ubuntu 16.04 results in the following crash error:

object.Error@(0): The function you are calling is not pressent in your version of GTK+.
----------------
??:? extern (C) void gtkd.Loader.Linker.unsupportedSymbol() [0xc2ce79]
??:? void vte.Terminal.Terminal.copyClipboardFormat(vte.c.types.VteFormat) [0xa20210]
??:? void gx.tilix.terminal.terminal.Terminal.createActions(gio.SimpleActionGroup.SimpleActionGroup).__dgliteral6!(glib.Variant.Variant, gio.SimpleAction.SimpleAction).__dgliteral6(glib.Variant.Variant, gio.SimpleAction.SimpleAction) [0x9fd864]
??:? extern (C) void gio.SimpleAction.SimpleAction.callBackActivate(gio.c.types.GSimpleAction*, glib.c.types.GVariant*, gio.SimpleAction.SimpleAction.OnActivateDelegateWrapper) [0xa5ff65]
??:? g_closure_invoke [0x1aaabfa4]

[gnunn1]

Yeah that's only available in later versions of VTE and I forgot to version check it, I'll take care of it.