move text selection to TextScanner

ext/fg/js/frontend.js

@@ -185,10 +185,6 @@ class Frontend {
             type,
             {definitions, context: {sentence, url, focus, disableHistory: true}}
         );
-
-        if (this.options.scanning.selectText) {
-            textSource.select();
-        }
     }
 
     async findTerms(textSource) {

ext/mixed/js/text-scanner.js

@@ -206,6 +206,9 @@ class TextScanner {
         const results = await this.publish('textSearch', {textSource, cause});
         if (results.some((r) => r)) {
             this.textSourceCurrent = textSource;
+            if (this.options.scanning.selectText) {
+                textSource.select();
+            }
         }
         this.pendingLookup = false;
     }