clarify that the initially selected field separator is a guess

ftl/core/importing.ftl

@@ -15,6 +15,7 @@ importing-colon = Colon
 importing-comma = Comma
 importing-empty-first-field = Empty first field: { $val }
 importing-field-separator = Field separator
+importing-field-separator-guessed =  Field separator (guessed)
 importing-field-mapping = Field mapping
 importing-field-of-file-is = Field <b>{ $val }</b> of file is:
 importing-fields-separated-by = Fields separated by: { $val }

ts/routes/import-csv/FileOptions.svelte

@@ -65,7 +65,9 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         <SettingTitle
             on:click={() => openHelpModal(Object.keys(settings).indexOf("delimiter"))}
         >
-            {settings.delimiter.title}
+            {$metadata.forceDelimiter
+                ? settings.delimiter.title
+                : tr.importingFieldSeparatorGuessed()}
         </SettingTitle>
     </EnumSelectorRow>