Fix hint helper in element picker's text editor

Regression from:
- 262a1a044f

src/js/1p-filters.js

@@ -61,12 +61,11 @@ let cachedUserFilters = '';
     const responseHandler = function(response) {
         if ( response instanceof Object === false ) { return; }
         if ( response.hintUpdateToken !== undefined ) {
-            const firstVisit = hintUpdateToken === 0;
             const mode = cmEditor.getMode();
             if ( mode.setHints instanceof Function ) {
-                mode.setHints(response, firstVisit);
+                mode.setHints(response);
             }
-            if ( firstVisit ) {
+            if ( hintUpdateToken === 0 ) {
                 mode.parser.expertMode = response.expertMode !== false;
             }
             hintUpdateToken = response.hintUpdateToken;

src/js/asset-viewer.js

@@ -66,7 +66,7 @@
     if ( hints instanceof Object ) {
         const mode = cmEditor.getMode();
         if ( mode.setHints instanceof Function ) {
-            mode.setHints(hints, true);
+            mode.setHints(hints);
         }
     }
 

src/js/codemirror/ubo-static-filtering.js

@@ -35,6 +35,7 @@ const scriptletNames = new Map();
 const preparseDirectiveTokens = new Map();
 const preparseDirectiveHints = [];
 const originHints = [];
+let hintHelperRegistered = false;
 
 /******************************************************************************/
 
@@ -361,7 +362,7 @@ CodeMirror.defineMode('ubo-static-filtering', function() {
             style = style.trim();
             return style !== '' ? style : null;
         },
-        setHints: function(details, firstVisit = false) {
+        setHints: function(details) {
             if ( Array.isArray(details.redirectResources) ) {
                 for ( const [ name, desc ] of details.redirectResources ) {
                     const displayText = desc.aliasOf !== ''
@@ -389,7 +390,8 @@ CodeMirror.defineMode('ubo-static-filtering', function() {
                     originHints.push(hint);
                 }
             }
-            if ( firstVisit ) {
+            if ( hintHelperRegistered === false ) {
+                hintHelperRegistered = true;
                 initHints();
             }
         },