[WIP] Fixing stuff in light/white theme (#723)

* fixed color in light/white them when a tab lights pink

* fixes background color of chatterino in white/light-themes

* Fixed emoji-button in light/white-theme

* added light/white-theme addsplit-button

* forgot to add the image-file

resources/resources_autogenerated.qrc

@@ -10,6 +10,7 @@
     <file>tlds.txt</file>
     <file>avatars/fourtf.png</file>
     <file>avatars/pajlada.png</file>
+    <file>buttons/addSplit.png</file>
     <file>buttons/addSplitDark.png</file>
     <file>buttons/ban.png</file>
     <file>buttons/banRed.png</file>