Markdown: move preview font settings to legal draft plugin
Markdown: move preview font settings to legal draft plugin

GitOrigin-RevId: d9feae168a8ad9a98446c0fbaf58f239a9eec276
allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community