Hey, this is a really cool app I'd never seen before! I have added Milestones and Tags to a few other apps, so was able to do it here as well. I pasted in a section of code below. The bits I added are in red font. It works for me, I hope it works for you as well!
Ext.override(Rally.ui.inlinefilter.InlineFilterPanel, {
minHeight: 46,
padding: '8px 0 0 0',
bodyPadding: '7px 5px 5px 5px',
collapseDirection: 'top',
collapsible: true,
animCollapse: false,
config: {
inline: true,
collapsed: true,
anchorTargetCmp: undefined,
model: undefined,
context: undefined,
quickFilterPanelConfig: {
initialFilters: [],
addQuickFilterConfig:{whiteListFields:["Milestones", "Tags"]
}
},
advancedFilterPanelConfig: {
advancedFilterRowsConfig: {
propertyFieldConfig: {
whiteListFields: ["Milestones", "Tags"]
}
},
matchTypeConfig: {
value: 'AND'
}
}
},