Fix theme apply button so it updates instantly

I tried to do this while keeping the CSP changes but it seems like it is impossible, however, the themes do with with these enabled still and the CSP changes still working, so I am not sure why they were even implemented.

.gitignore

@@ -10,3 +10,4 @@ config/local.json
 config/local.*.json
 docs/site/
 .vscode/
+*.log

index.html

@@ -10,7 +10,6 @@
     <link rel="stylesheet" href="/static/font/css/lato.css">
     <link rel="stylesheet" href="/static/mfm.css">
     <link rel="stylesheet" href="/static/custom.css">
-    <link rel="stylesheet" href="/static/theme-holder.css" id="theme-holder">
     <!--server-generated-meta-->
     <link rel="icon" type="image/png" href="/favicon.png">
     <link rel="manifest" href="/manifest.json">

src/components/settings_modal/tabs/theme_tab/theme_tab.js

@@ -115,7 +115,8 @@ export default {
       avatarRadiusLocal: '',
       avatarAltRadiusLocal: '',
       attachmentRadiusLocal: '',
-      tooltipRadiusLocal: ''
+      tooltipRadiusLocal: '',
+      chatMessageRadiusLocal: ''
     }
   },
   created () {
@@ -230,7 +231,8 @@ export default {
         avatar: this.avatarRadiusLocal,
         avatarAlt: this.avatarAltRadiusLocal,
         tooltip: this.tooltipRadiusLocal,
-        attachment: this.attachmentRadiusLocal
+        attachment: this.attachmentRadiusLocal,
+        chatMessage: this.chatMessageRadiusLocal
       }
     },
     preview () {

src/services/style_setter/style_setter.js

@@ -4,10 +4,12 @@ import { getColors, computeDynamicColor, getOpacitySlot } from '../theme_data/th
 
 export const applyTheme = (input) => {
   const { rules } = generatePreset(input)
+  const head = document.head
   const body = document.body
   body.classList.add('hidden')
 
-  const styleEl = document.getElementById('theme-holder')
+  const styleEl = document.createElement('style')
+  head.appendChild(styleEl)
   const styleSheet = styleEl.sheet
 
   styleSheet.toString()

static/theme-holder.css

@@ -1 +0,0 @@
-// This file intentionally left blank