IDEA-165089 add ability to remove a label before combobox

platform/platform-impl/src/com/intellij/application/options/schemes/AbstractSchemesPanel.java

@@ -70,8 +70,11 @@ public abstract class AbstractSchemesPanel<T extends Scheme, InfoComponent exten
   private void createUIComponents() {
     JPanel controlsPanel = new JPanel();
     controlsPanel.setLayout(new BoxLayout(controlsPanel, BoxLayout.LINE_AXIS));
-    controlsPanel.add(new JLabel(getSchemeTypeName() + ":"));
-    controlsPanel.add(Box.createRigidArea(new JBDimension(10, 0)));
+    String label = getComboBoxLabel();
+    if (label != null) {
+      controlsPanel.add(new JLabel(label));
+      controlsPanel.add(Box.createRigidArea(new JBDimension(10, 0)));
+    }
     myActions = createSchemeActions();
     mySchemesCombo = new EditableSchemesCombo<>(this);
     controlsPanel.add(mySchemesCombo.getComponent());
@@ -172,6 +175,14 @@ public abstract class AbstractSchemesPanel<T extends Scheme, InfoComponent exten
   @NotNull
   protected abstract InfoComponent createInfoComponent();
 
+  /**
+   * @return a string label to place before the combobox or {@code null} if it is not needed
+   */
+  @Nullable
+  protected String getComboBoxLabel() {
+    return getSchemeTypeName() + ":";
+  }
+
   protected String getSchemeTypeName() {
     return ApplicationBundle.message("editbox.scheme.type.name");
   }

platform/platform-impl/src/com/intellij/openapi/keymap/impl/ui/KeymapSelector.java

@@ -52,6 +52,12 @@ final class KeymapSelector extends SimpleSchemesPanel<KeymapScheme> {
     return getManager();
   }
 
+  @Nullable
+  @Override
+  protected String getComboBoxLabel() {
+    return null;
+  }
+
   @Override
   protected String getSchemeTypeName() {
     return "Keymap";