Remove min and max font setting

src/FontWatcher.js

@@ -18,6 +18,10 @@ import dis from './dispatcher';
 import SettingsStore, {SettingLevel} from './settings/SettingsStore';
 
 export class FontWatcher {
+
+    static minSize = 13;
+    static maxSize = 20;
+
     constructor() {
         this._dispatcherRef = null;
     }
@@ -38,10 +42,7 @@ export class FontWatcher {
     };
 
     _setRootFontSize = (size) => {
-        const min = SettingsStore.getValue("fontSizeMin");
-        const max = SettingsStore.getValue("fontSizeMax");
-
-        const fontSize = Math.max(Math.min(max, size), min);
+        const fontSize = Math.max(Math.min(this.maxSize, size), this.minSize);
 
         if (fontSize != size) {
             SettingsStore.setValue("fontSize", null, SettingLevel.Device, fontSize);

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

@@ -25,7 +25,7 @@ import Field from "../../../elements/Field";
 import Slider from "../../../elements/Slider";
 import AccessibleButton from "../../../elements/AccessibleButton";
 import dis from "../../../../../dispatcher";
-import _range from "lodash/range";
+import { FontWatcher } from "../../../../../FontWatcher";
 
 export default class AppearanceUserSettingsTab extends React.Component {
     constructor() {
@@ -109,8 +109,8 @@ export default class AppearanceUserSettingsTab extends React.Component {
         console.log({value});
 
         const parsedSize = parseFloat(value);
-        const min = SettingsStore.getValue("fontSizeMin");
-        const max = SettingsStore.getValue("fontSizeMax");
+        const min = FontWatcher.minSize;
+        const max = FontWatcher.maxSize;
 
         if (isNaN(parsedSize)) {
             return {valid: false, feedback: _t("Size must be a number")};

src/settings/Settings.js

@@ -171,16 +171,6 @@ export const SETTINGS = {
         default: 16,
         controller: new FontSizeController(),
     },
-    "fontSizeMin": {
-        displayName: _td("Min font size"),
-        supportedLevels: LEVELS_ACCOUNT_SETTINGS,
-        default: 13,
-    },
-    "fontSizeMax": {
-        displayName: _td("Max font size"),
-        supportedLevels: LEVELS_ACCOUNT_SETTINGS,
-        default: 20,
-    },
     "useCustomFontSize": {
         displayName: _td("Custom font size"),
         supportedLevels: LEVELS_ACCOUNT_SETTINGS,