Bug: invisible error

Summary

1. Fix for https://gitlab.com/caosdb/caosdb-webui/-/issues/207 Related issue: #316 (closed)

2. Unrelated: I notices that the "E" for "Entity" was not visible either and added a css rule for that as well.

Focus

There was a

Test Environment

Manual Testing:

1. Request an entity which does not exist, e.g. https://localhost:10443/Entity/asdf
2. Do the steps from https://gitlab.com/caosdb/caosdb-webui/-/issues/207
3. Try and delete an entity which is required by other entities

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src/core/css/webcaosdb.css

@@ -51,6 +51,11 @@ footer {
   margin-right: 8px;
 }
 
+.caosdb-messages .caosdb-v-message-badge {
+  background-color: var(--bs-alert-bg);
+  color: var(--bs-alert-color);
+}
+
 div.export-data {
     display: none;
 }
@@ -446,6 +451,11 @@ body[data-hidden-properties="true"] .caosdb-v-entity-being-edited .caosdb-v-hidd
     border: 1px solid #C92E86;
 }
 
+.caosdb-label-entity {
+    background-color: #666;
+    border: 1px solid #666;
+}
+
 .caosdb-parents-heading {
     padding-top: 2px;
     padding-bottom: 2px;

[Timm Fitschen]

this handles the background for errors, warnings, and info messages in one line.

[Timm Fitschen]

gray, like something that is quite irrelevant.