Allow renaming F-curve modifier

Modifier name is being displayed as label in panel header which has restricted
the name editing of it. Patch will allow to change the name of F-curve modifier
by exposing string property "name"

Differential Revision: https://archive.blender.org/developer/D17142

@@ -1110,2 +1110,4 @@
   BLI_addtail(modifiers, fcm);
 
+  /* Copy Modifier name. */
+  BLI_strncpy(fcm->name, fmi->name, sizeof(fmi->name));

@@ -321,2 +316,2 @@
-  else {
-    uiItemL(sub, IFACE_("<Unknown Modifier>"), ICON_NONE);
+  if (fmi && fcm->name[0] == '\0') {
+    BLI_strncpy(fcm->name, fmi->name, sizeof(fmi->name));

@@ -761,0 +766,4 @@
+  BLI_strncpy(fcm->name, value, sizeof(fcm->name));
+
+  /* Check unique name. */
+  const FModifierTypeInfo *fmi = get_fmodifier_typeinfo(fcm->type);

@@ -1112,0 +1113,4 @@
+  BLI_strncpy(fcm->name, fmi->name, sizeof(fcm->name));
+
+  /* Check unique name. */
+  BKE_fmodifier_unique_name_set(fcm);

@@ -1109,6 +1109,9 @@ FModifier *add_fmodifier(ListBase *modifiers, int type, FCurve *owner_fcu)
   fcm->influence = 1.0f;
   BLI_addtail(modifiers, fcm);
 
+  /* Set modifier name. */

@@ -4284,2 +4284,4 @@
   }
 
+  /* Set fcurve modifier name and check their uniqueness when opening old files. Otherwise
+   * modifiers would have empty name field. */

@@ -240,6 +240,9 @@ void BKE_fcurves_free(ListBase *list);
  */
 void BKE_fcurves_copy(ListBase *dst, ListBase *src);
 
+/* Set fcurve modifier name and check uniqueness. */

@@ -241,2 +241,4 @@
 void BKE_fcurves_copy(ListBase *dst, ListBase *src);
 
+/* Set fcurve modifier name and ensure uniqueness.
+ * Pass new name string when its edited otherwise pass empty string. */