Added unit to db and structs/types.

frontend/app/components/article/article.vue

@@ -115,7 +115,7 @@
 
       <v-card-text>
         <v-row no-gutters>
-          <v-col cols="2">
+          <v-col cols="2" style="padding: 5px;">
             <v-row no-gutters>
               <v-checkbox
                   v-model="store.articleEdit.bio"
@@ -126,16 +126,21 @@
 
             <v-row no-gutters>
               <v-col cols="5">
-                <v-sheet>
-                  Herkunft:
-                </v-sheet>
+                Herkunft:
               </v-col>
               <v-col>
-                <v-sheet>
-                  {{ originToString(store.article.origin) }}
-                </v-sheet>
+                {{ originToString(store.article.origin) }}
               </v-col>
             </v-row>
+
+            <v-row>
+              <v-select
+                  v-model="store.articleEdit.default_unit"
+                  :items="store.units"
+                  label="Standard Einheit"
+                  :readonly="!edit"
+              ></v-select>
+            </v-row>
           </v-col>
 
           <v-col cols="5" style="padding: 5px;">