create body isolation function

web/kiri/index.html

@@ -286,6 +286,7 @@
                 <div id="ft-mesh" class="grow f-col pop">
                     <div id="ft-mesh-btn">
                         <div><button id="mesh-merge" lk="rc_merg">Merge</button></div>
+                        <div><button id="mesh-split" lk="rc_splt">Isolate Bodies</button></div>
                         <div><button id="mesh-export-obj" lk="rc_xobj">export OBJ</button></div>
                         <div><button id="mesh-export-stl" lk="rc_xstl">export STL</button></div>
                     </div>

web/kiri/lang/en.js

@@ -78,6 +78,7 @@ self.lang['en-us'] = {
     rc_xstl:        "export STL",
     sb_info:        ["print speed","in mm/s"],
     rc_merg:        "merge object meshes",
+    rc_splt:        "isolate bodies",
 
     // DEVICE MENU and related dialogs
     dm_sldt:        "select a device type",