m-changelog-change-body"><div class="qm-html-paragraph">Sets the context class for the titlebar, removing any other existing context classes in the process. </div></div></div></div></div><div class="qm-changelog-entry"><div class="qm-changelog-entry-header qm-code-font"><span class="qm-changelog-css-header"><span class="qm-changelog-css-class"><div class="qm-api-item-header qm-api-item-header-class"><span class="qm-api-css-header-name qm-api-header-details qm-code-font" id="hx-heading">hx-heading</span><spa