fix lang slice/preview overrides. add slice and start verbs

web/kiri/index.html

@@ -131,7 +131,7 @@
             </div>
             <div id="act-slice" class="lt-menu lt-active">
                 <i class="fas fa-bars"></i>
-                <label id="label-slice" title="analyze parts">slice</label>
+                <label id="label-slice" title="analyze parts" lk="slice">slice</label>
                 <div id="pop-slice" class="pop-lcol f-row">
                     <div id="act-preview">
                         <i class="fas fa-cubes"></i>

web/kiri/lang/de-de.js

@@ -43,7 +43,6 @@ kiri.lang['de-de'] = {
     view:           "Ansicht",          // left view pop menu
     wire:           "Drahtansicht",     // left render pop menu
 
-    acct_xpo:       ["make a backup of your device","and device profiles with the","option to include workspace","objects and positions"],
     acct_xpo:       ["Lege ein Backup Deiner Geräte","und Geräte-Profile an, mit der","Option, den Arbeitsbereich und","mit Objekten und Anordnung zu speichern"],
 
     // RIGHT-CLICK CONTEXT MENU

web/kiri/lang/en.js

@@ -34,7 +34,9 @@ kiri.lang['en-us'] = {
     setup:          "setup",
     settings:       "settings",
     size:           "size",
+    slice:          "slice",
     solid:          "solid",        // view type pop menu
+    start:          "start",
     tool:           "tool",
     tools:          "tools",        // CAM tool menu button
     top:            "top",