Fix "max depth in thread" setting

src/components/settings_modal/helpers/integer_setting.js

@@ -0,0 +1,37 @@
+import { get, set } from 'lodash'
+import ModifiedIndicator from './modified_indicator.vue'
+export default {
+  components: {
+    ModifiedIndicator
+  },
+  props: {
+    path: String,
+    disabled: Boolean,
+    min: Number
+  },
+  computed: {
+    pathDefault () {
+      const [firstSegment, ...rest] = this.path.split('.')
+      return [firstSegment + 'DefaultValue', ...rest].join('.')
+    },
+    state () {
+      const value = get(this.$parent, this.path)
+      if (value === undefined) {
+        return this.defaultState
+      } else {
+        return value
+      }
+    },
+    defaultState () {
+      return get(this.$parent, this.pathDefault)
+    },
+    isChanged () {
+      return this.state !== this.defaultState
+    }
+  },
+  methods: {
+    update (e) {
+      set(this.$parent, this.path, parseInt(e.target.value))
+    }
+  }
+}

src/components/settings_modal/helpers/integer_setting.vue

@@ -0,0 +1,20 @@
+<template>
+  <span class="IntegerSetting">
+    <label :for="path">
+      <slot />
+    </label>
+    <input
+      :id="path"
+      class="number-input"
+      type="number"
+      step="1"
+      :disabled="disabled"
+      :min="min || 0"
+      :value="state"
+      @change="update"
+    >
+    <ModifiedIndicator :changed="isChanged" />
+  </span>
+</template>
+
+<script src="./integer_setting.js"></script>

src/components/settings_modal/tabs/filtering_tab.js

@@ -1,6 +1,7 @@
 import { filter, trim } from 'lodash'
 import BooleanSetting from '../helpers/boolean_setting.vue'
 import ChoiceSetting from '../helpers/choice_setting.vue'
+import IntegerSetting from '../helpers/integer_setting.vue'
 
 import SharedComputedObject from '../helpers/shared_computed_object.js'
 
@@ -17,7 +18,8 @@ const FilteringTab = {
   },
   components: {
     BooleanSetting,
-    ChoiceSetting
+    ChoiceSetting,
+    IntegerSetting
   },
   computed: {
     ...SharedComputedObject(),

src/components/settings_modal/tabs/filtering_tab.vue

@@ -60,17 +60,12 @@
         </li>
         <h3>{{ $t('settings.attachments') }}</h3>
         <li>
-          <label for="maxThumbnails">
+          <IntegerSetting
-            {{ $t('settings.max_thumbnails') }}
+            path="maxThumbnails"
-          </label>
+            :min="0"
-          <input
-            id="maxThumbnails"
-            path.number="maxThumbnails"
-            class="number-input"
-            type="number"
-            min="0"
-            step="1"
           >
+            {{ $t('settings.max_thumbnails') }}
+          </IntegerSetting>
         </li>
         <li>
           <BooleanSetting path="hideAttachments">

src/components/settings_modal/tabs/general_tab.js

@@ -1,5 +1,6 @@
 import BooleanSetting from '../helpers/boolean_setting.vue'
 import ChoiceSetting from '../helpers/choice_setting.vue'
+import IntegerSetting from '../helpers/integer_setting.vue'
 import InterfaceLanguageSwitcher from 'src/components/interface_language_switcher/interface_language_switcher.vue'
 
 import SharedComputedObject from '../helpers/shared_computed_object.js'
@@ -47,6 +48,7 @@ const GeneralTab = {
   components: {
     BooleanSetting,
     ChoiceSetting,
+    IntegerSetting,
     InterfaceLanguageSwitcher
   },
   computed: {

src/components/settings_modal/tabs/general_tab.vue

@@ -176,17 +176,12 @@
             </BooleanSetting>
           </li>
           <li>
-            <label for="maxDepthInThread">
+            <IntegerSetting
-              {{ $t('settings.max_depth_in_thread') }}
+              path="maxDepthInThread"
-            </label>
+              :min="3"
-            <input
-              id="maxDepthInThread"
-              path.number="maxDepthInThread"
-              class="number-input"
-              type="number"
-              min="3"
-              step="1"
             >
+              {{ $t('settings.max_depth_in_thread') }}
+            </IntegerSetting>
           </li>
           <li>
             <ChoiceSetting