Move the IFWL_Edit Events out of ifwl_edit.h

This Cl moves the edit events to actual class files and renames to drop the
Edt from the names.

Review-Url: https://codereview.chromium.org/2515463002
diff --git a/BUILD.gn b/BUILD.gn
index d7cab2d..99823cf 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1180,6 +1180,8 @@
       "xfa/fwl/core/cfwl_edit.h",
       "xfa/fwl/core/cfwl_event.cpp",
       "xfa/fwl/core/cfwl_event.h",
+      "xfa/fwl/core/cfwl_evtcheckword.cpp",
+      "xfa/fwl/core/cfwl_evtcheckword.h",
       "xfa/fwl/core/cfwl_evtclick.cpp",
       "xfa/fwl/core/cfwl_evtclick.h",
       "xfa/fwl/core/cfwl_evtclose.cpp",
@@ -1198,6 +1200,12 @@
       "xfa/fwl/core/cfwl_evtsetfocus.h",
       "xfa/fwl/core/cfwl_evtsizechanged.cpp",
       "xfa/fwl/core/cfwl_evtsizechanged.h",
+      "xfa/fwl/core/cfwl_evttextchanged.cpp",
+      "xfa/fwl/core/cfwl_evttextchanged.h",
+      "xfa/fwl/core/cfwl_evttextfull.cpp",
+      "xfa/fwl/core/cfwl_evttextfull.h",
+      "xfa/fwl/core/cfwl_evtvalidate.cpp",
+      "xfa/fwl/core/cfwl_evtvalidate.h",
       "xfa/fwl/core/cfwl_listbox.cpp",
       "xfa/fwl/core/cfwl_listbox.h",
       "xfa/fwl/core/cfwl_listitem.cpp",