feat: improve search bar behaviour when using key bindings

Before, the search bar would toggle, which was quite annoying. Now, it replicates IntelliJ's search bar behaviour.

1.1. If the user has selected text, use that as the search text
1.2. Otherwise, use the previous search text (or empty if none)
2. Select all text in the search bar and give it focus

jadx-gui/src/main/java/jadx/gui/ui/codearea/CodePanel.java

@@ -64,7 +64,7 @@ public CodePanel(AbstractCodeArea codeArea) {
 
 			@Override
 			public void actionPerformed(ActionEvent e) {
-				searchBar.toggle();
+				searchBar.showAndFocus();
 			}
 		});
 		JMenuItem searchItem = new JMenuItem();

jadx-gui/src/main/java/jadx/gui/ui/codearea/SearchBar.java

@@ -140,6 +140,24 @@ public void keyReleased(KeyEvent e) {
 		setVisible(false);
 	}
 
+	/*
+	 * Replicates IntelliJ's search bar behavior
+	 * 1.1. If the user has selected text, use that as the search text
+	 * 1.2. Otherwise, use the previous search text (or empty if none)
+	 * 2. Select all text in the search bar and give it focus
+	 */
+	public void showAndFocus() {
+		setVisible(true);
+
+		String selectedText = rTextArea.getSelectedText();
+		if (!StringUtils.isEmpty(selectedText)) {
+			searchField.setText(selectedText);
+		}
+
+		searchField.selectAll();
+		searchField.requestFocus();
+	}
+
 	public void toggle() {
 		boolean visible = !isVisible();
 		setVisible(visible);
@@ -149,8 +167,8 @@ public void toggle() {
 			if (!StringUtils.isEmpty(preferText)) {
 				searchField.setText(preferText);
 			}
-			searchField.requestFocus();
 			searchField.selectAll();
+			searchField.requestFocus();
 		} else {
 			rTextArea.requestFocus();
 		}