Bug 275171 [Contributions] Customize Perspective action breaks editor pinning action
Using M7, I enabled editor pinning (i.e. Reuse editor) and pinned an editor using an action in the toolbar. I then disabled editor pinning ad then opened the customized perspective dialog. After this, enabling/disabling editor pinning does not make the Pin Editor action reappear.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
}
        if (menuId.equals(IWorkbenchActionConstants.M_WINDOW)) {
			return true;
		}
        return false;
    }
    /**
     * Return whether or not given id matches the id of the coolitems that
     * the workbench creates.
     */
    public boolean isWorkbenchCoolItemId(String id) {
        if (IWorkbenchActionConstants.TOOLBAR_FILE.equalsIgnoreCase(id)) {
			return true;
		}
        if (IWorkbenchActionConstants.TOOLBAR_NAVIGATE.equalsIgnoreCase(id)) {
			return true;
		}
        return false;
    }
    /**
     * Fills the status line with the workbench contribution items.
     */
    protected void fillStatusLine(IStatusLineManager statusLine) {
        statusLine.add(statusLineItem);
    }
    /**
     * Creates actions (and contribution items) for the menu bar, toolbar and status line.
     */
    protected void makeActions(final IWorkbenchWindow window) {