Accessibility improvements

src/client/components/facet_bar/TextFacet.js

@@ -79,7 +79,7 @@ class TextFacet extends React.Component {
     } else {
       searchButton = (
         <IconButton
-          aria-label={placeholder}
+          aria-label='search'
           onClick={this.handleClick}
           onMouseDown={this.handleMouseDown}
         >
@@ -95,6 +95,7 @@ class TextFacet extends React.Component {
           <Input
             id='adornment-search'
             type='text'
+            aria-label='search'
             value={this.state.value}
             disabled={this.props.someFacetIsFetching}
             onChange={this.handleChange}

src/client/components/main_layout/ImageGallerySRL.js

@@ -48,11 +48,12 @@ const ImageGallerySRL = props => {
   })
   return (
     <>
-      <Button onClick={() => openLightbox()}>
+      <Button aria-label='open larger image' onClick={() => openLightbox()}>
         <img
           className={classes.previewImage}
           height={props.previewImageHeight}
           src={images[0].src}
+          alt='preview image'
         />
       </Button>
       <SRLWrapper options={srlOptions} elements={images} />