[fix] theme simple: image viewer hides autocomplete suggestions

Closes: https://github.com/searxng/searxng/issues/3509
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/src/less/autocomplete.less

@@ -53,7 +53,7 @@
     color: var(--color-autocomplete-font);
     max-height: 32rem;
     overflow-y: auto;
-    z-index: 100;
+    z-index: 5000;
     margin-top: 3.5rem;
     border-radius: 0.8rem;
 

searx/static/themes/simple/src/less/detail.less

@@ -22,7 +22,7 @@ article.result-images .detail {
   bottom: 0;
   background: var(--color-result-detail-background);
   border: 1px solid var(--color-result-detail-background);
-  z-index: 10000;
+  z-index: 1000;
   padding: 4rem 3rem 3rem 3rem;
 
   a.result-images-source {
@@ -148,7 +148,7 @@ article.result-images .detail {
     height: 1.5rem;
     position: absolute;
     filter: opacity(40%);
-    z-index: 2000002;
+    z-index: 1200;
 
     span {
       display: block;

searx/static/themes/simple/src/less/search.less

@@ -158,7 +158,7 @@ button.category_button {
   outline: none;
   color: var(--color-search-font);
   font-size: 1.1rem;
-  z-index: 10000;
+  z-index: 1000;
 
   &:hover {
     color: var(--color-search-background-hover);
@@ -183,7 +183,7 @@ html.no-js #clear_search.hide_if_nojs {
   outline: none;
   color: var(--color-search-font);
   font-size: 1.1rem;
-  z-index: 2;
+  z-index: 100;
 }
 
 #q {
@@ -332,7 +332,7 @@ html.no-js #clear_search.hide_if_nojs {
     top: 0;
     height: 100%;
     width: 100%;
-    z-index: 10000;
+    z-index: 2000;
 
     .search_box {
       border-bottom: 1px solid var(--color-search-border);

searx/static/themes/simple/src/less/toolkit.less

@@ -203,7 +203,7 @@ div.selectable_url {
   left: 50%;
   margin: 0 auto;
   transform: translate(-50%, -50%);
-  z-index: 10000000;
+  z-index: 5000;
 
   h3 {
     margin-top: 0;
@@ -339,7 +339,7 @@ select {
   padding: 0.2rem !important;
   color: var(--color-search-font);
   font-size: 0.9rem;
-  z-index: 2;
+  z-index: 100;
 
   &:hover,
   &:focus {
@@ -413,7 +413,7 @@ input.checkbox-onoff[type="checkbox"] {
     border: 1px solid var(--color-btn-background);
     border-radius: 12px;
     box-shadow: var(--color-btn-background) 0 0 3px;
-    z-index: 10000;
+    z-index: 1200;
     top: -0.55em;
     left: -0.6em;
   }
@@ -573,7 +573,7 @@ input.checkbox-onoff.reversed-checkbox[type="checkbox"] {
   background: var(--color-toolkit-engine-tooltip-background);
   font-size: 14px;
   font-weight: normal;
-  z-index: 1000000;
+  z-index: 5000;
   text-align: left;
   .rounded-corners;
 }