Revert "Only show "keep open" emoji checkbox on post form"

This reverts commit e9f47509ae.

src/components/emoji_input/emoji_input.vue

@@ -18,7 +18,6 @@
       <EmojiPicker
         v-if="enableEmojiPicker"
         ref="picker"
-        show-keep-open
         :class="{ hide: !showPicker }"
         :enable-sticker-picker="enableStickerPicker"
         class="emoji-picker-panel"

src/components/emoji_picker/emoji_picker.js

@@ -27,11 +27,6 @@ const EmojiPicker = {
       required: false,
       type: Boolean,
       default: false
-    },
-    showKeepOpen: {
-      required: false,
-      type: Boolean,
-      default: false
     }
   },
   data () {

src/components/emoji_picker/emoji_picker.vue

@@ -84,10 +84,7 @@
             <span :ref="'group-end-' + group.id" />
           </div>
         </div>
-        <div
-          v-if="showKeepOpen"
-          class="keep-open"
-        >
+        <div class="keep-open">
           <Checkbox v-model="keepOpen">
             {{ $t('emoji.keep_open') }}
           </Checkbox>