chore: Add missing labels to buttons without text and search inputs

app/scenes/Collection.js

@@ -145,6 +145,8 @@ class CollectionScene extends React.Component<Props> {
               <InputSearch
                 source="collection"
                 placeholder={`${t("Search in collection")}…`}
+                label={`${t("Search in collection")}…`}
+                labelHidden
                 collectionId={match.params.id}
               />
             </Action>

app/scenes/Dashboard.js

@@ -64,7 +64,11 @@ function Dashboard() {
       </Switch>
       <Actions align="center" justify="flex-end">
         <Action>
-          <InputSearch source="dashboard" />
+          <InputSearch
+            source="dashboard"
+            label={t("Search documents")}
+            labelHidden
+          />
         </Action>
         <Action>
           <NewDocumentMenu />

app/scenes/Drafts.js

@@ -113,7 +113,11 @@ class Drafts extends React.Component<Props> {
 
         <Actions align="center" justify="flex-end">
           <Action>
-            <InputSearch source="drafts" />
+            <InputSearch
+              source="drafts"
+              label={t("Search documents")}
+              labelHidden
+            />
           </Action>
           <Action>
             <NewDocumentMenu />

app/scenes/Starred.js

@@ -48,7 +48,11 @@ function Starred(props: Props) {
 
       <Actions align="center" justify="flex-end">
         <Action>
-          <InputSearch source="starred" />
+          <InputSearch
+            source="starred"
+            label={t("Search documents")}
+            labelHidden
+          />
         </Action>
         <Action>
           <NewDocumentMenu />