style: quick fixes

small improvements in app style
- fade in splash screen
- notifications without sound
- change header style
- non selectable text app wide
- change logo
- lock button more accessible
- link to help
- tooltip on collapse delay
- tooltip on private / public event toggle

client/src/common/input/EditableText.module.css

@@ -8,9 +8,12 @@
 
 .block {
   display: 'block';
-  overflow-x: hidden;
+  overflow: hidden;
 }
 
 .inline {
   display: inline;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }