fix(ui5-file-uploader): adjust tokenizer expand/collapse behaviour (#11985)

Issue:

- The internal ui5-tokenizer collapses when focus moves from the tokens to the file uploader.
Another precondition is to have all the tokens in the more popover when the file uploader ins't focused.

Author: unazko

packages/main/src/FileUploader.ts

@@ -283,9 +283,6 @@ class FileUploader extends UI5Element implements IFormInputElement {
 	@property({ type: Boolean, noAttribute: true })
 	_tokenizerOpen = false;
 
-	@property({ type: Boolean, noAttribute: true })
-	_tokenizerExpanded = true;
-
 	static emptyInput: HTMLInputElement;
 
 	@i18n("@ui5/webcomponents")
@@ -397,12 +394,24 @@ class FileUploader extends UI5Element implements IFormInputElement {
 
 	_onfocusin() {
 		this.focused = true;
-		this._tokenizerExpanded = true;
+		if (this._tokenizer) {
+			this._tokenizer.expanded = true;
+		}
 	}
 
 	_onfocusout() {
 		this.focused = false;
-		this._tokenizerExpanded = this._tokenizerOpen || false;
+		if (this._tokenizer) {
+			this._tokenizer.expanded = this._tokenizerOpen;
+		}
+	}
+
+	get _tokenizerExpanded(): boolean {
+		if (!this._tokenizer) {
+			return true;
+		}
+
+		return this._tokenizer.expanded;
 	}
 
 	_onTokenizerKeyUp(e: KeyboardEvent) {