Add missing caption on preview checkbox

lazpaint/dialog/filter/uwavedisplacement.lfm

@@ -128,6 +128,7 @@ object FWaveDisplacement: TFWaveDisplacement
     Height = 19
     Top = 214
     Width = 151
+    Caption = 'rsPreview'
     Checked = True
     OnChange = CheckBox_PreviewChange
     State = cbChecked

lazpaint/dialog/filter/uwavedisplacement.lrj

@@ -3,6 +3,7 @@
 {"hash":261514778,"name":"tfwavedisplacement.label_wavelength.caption","sourcebytes":[87,97,118,101,108,101,110,103,116,104,32,58],"value":"Wavelength :"},
 {"hash":211645722,"name":"tfwavedisplacement.label_displacement.caption","sourcebytes":[68,105,115,112,108,97,99,101,109,101,110,116,32,58],"value":"Displacement :"},
 {"hash":115906410,"name":"tfwavedisplacement.label_phase.caption","sourcebytes":[80,104,97,115,101,32,58],"value":"Phase :"},
+{"hash":126662215,"name":"tfwavedisplacement.checkbox_preview.caption","sourcebytes":[114,115,80,114,101,118,105,101,119],"value":"rsPreview"},
 {"hash":497723,"name":"tfwavedisplacement.button_ok.caption","sourcebytes":[114,115,79,75],"value":"rsOK"},
 {"hash":127421996,"name":"tfwavedisplacement.button_cancel.caption","sourcebytes":[114,115,67,97,110,99,101,108],"value":"rsCancel"}
 ]}