gui improvements

frontend/src/routes/document/PositionSelector.svelte

@@ -26,7 +26,6 @@
         bottom: 20px;
         left: 0;
         right: 0;
-        background: rgba(0,0,0,0.9);
         padding: 10px;
         overflow: auto;
 
@@ -37,7 +36,7 @@
     }
 </style>
 
-<div>
+<div class="position_selector">
     <span class="tabs">
         <button onclick={() => select=0}>{t('document.items')}</button>
         <button onclick={() => select=1}>{t('document.estimated_times')}</button>

frontend/src/routes/document/View.svelte

@@ -179,7 +179,9 @@
     <fieldset>
         <legend>
             {t('document.positions')}
+            {#if editable}
             <button onclick={() => position_select = true}>{t('document.add_position')}</button>
+            {/if}
         </legend>
         <PositionList bind:document={doc} {submit} />
     </fieldset>