Add support for ".dae" (and others) to filepicker load filter.

* Brought llfilepicker.{cpp,h} up to speed with V3 by adding
  FFLOAD_MODEL, FFLOAD_COLLADA, FFLOAD_SCRIPT, FFLOAD_DICTIONARY
  However, note that we used FFLOAD_LSL, so I renamed their
  FFLOAD_SCRIPT to FFLOAD_LSL and kept our way of filtering.
* Fixed the filter token that is sent to the plugin for
  collada (from "dae" to "collada").

indra/newview/statemachine/aifilepicker.cpp

@@ -147,9 +147,6 @@ void AIFilePicker::open(ELoadFilter filter, std::string const& default_path, std
 	  case FFLOAD_ANIM:
 		  mFilter = "anim";
 		  break;
-	  case FFLOAD_COLLADA:
-		  mFilter = "dae";
-		  break;
 #ifdef _CORY_TESTING
 	  case FFLOAD_GEOMETRY:
 		  mFilter = "geometry";
@@ -164,6 +161,18 @@ void AIFilePicker::open(ELoadFilter filter, std::string const& default_path, std
 	  case FFLOAD_RAW:
 		  mFilter = "raw";
 		  break;
+	  case FFLOAD_MODEL:
+		  mFilter = "model";
+		  break;
+	  case FFLOAD_COLLADA:
+		  mFilter = "collada";
+		  break;
+	  case FFLOAD_LSL:
+		  mFilter = "lsl";
+		  break;
+	  case FFLOAD_DICTIONARY:
+		  mFilter = "dictionary";
+		  break;
 	  case FFLOAD_INVGZ:
 		  mFilter = "invgz";
 		  break;

indra/newview/statemachine/aifilepicker.h

@@ -43,10 +43,13 @@ enum ELoadFilter
 	FFLOAD_WAV,
 	FFLOAD_IMAGE,
 	FFLOAD_ANIM,
-	FFLOAD_COLLADA,
 	FFLOAD_XML,
 	FFLOAD_SLOBJECT,
 	FFLOAD_RAW,
+	FFLOAD_MODEL,
+	FFLOAD_COLLADA,
+	FFLOAD_LSL,
+	FFLOAD_DICTIONARY,
 	FFLOAD_INVGZ,
 	FFLOAD_AO,
 	FFLOAD_BLACKLIST
@@ -66,11 +69,11 @@ enum ESaveFilter
 	FFSAVE_J2C,
 	FFSAVE_PNG,
 	FFSAVE_JPEG,
+	FFSAVE_LSL,
 	FFSAVE_ANIMATN,
 	FFSAVE_OGG,
 	FFSAVE_NOTECARD,
 	FFSAVE_GESTURE,
-	FFSAVE_LSL,
 	FFSAVE_SHAPE,
 	FFSAVE_SKIN,
 	FFSAVE_HAIR,