FIx roomsublist heights.

- also fiddles the font size numbers

src/components/views/settings/tabs/user/AppearanceUserSettingsTab.js

@@ -252,7 +252,7 @@ export default class AppearanceUserSettingsTab extends React.Component {
             <div className="mx_AppearanceUserSettingsTab_fontSlider">
                 <div className="mx_AppearanceUserSettingsTab_fontSlider_smallText">Aa</div>
                 <Slider
-                    values={[13, 14, 15, 18, 20]}
+                    values={[13, 15, 16, 18, 20]}
                     value={this.state.fontSize}
                     onSelectionChange={this._onFontSizeChanged}
                     displayFunc={value => {}}