feat: center dialogs vertically

src/views/Settings/dialogs/ChangelogDialog.vue

@@ -4,7 +4,6 @@
         :visible="changeLogDialog.visible"
         :title="t('dialog.change_log.header')"
         width="800px"
-        top="5vh"
         append-to-body
         @close="closeDialog">
         <div v-loading="!changeLogDialog.changeLog" class="changelog-dialog">

src/views/Settings/dialogs/FeedFiltersDialog.vue

@@ -3,7 +3,6 @@
         :visible="!!feedFiltersDialogMode"
         :title="dialogTitle"
         width="550px"
-        top="5vh"
         destroy-on-close
         @close="handleDialogClose">
         <div class="toggle-list" style="height: 75vh; overflow-y: auto">

src/views/Settings/dialogs/VRChatConfigDialog.vue

@@ -4,7 +4,6 @@
         :visible="isVRChatConfigDialogVisible"
         :title="t('dialog.config_json.header')"
         width="420px"
-        top="10vh"
         @close="closeDialog">
         <div v-loading="loading">
             <div style="font-size: 12px; word-break: keep-all">