Fix close icon hidden by long file name in compose file preview (#7077)

A long file name took all the row width and squeezed the cancel (X)
icon to zero, so the file could not be dismissed before sending.
Give the file-name text the layout weight and a single line (Compose),
and lineLimit(1) on iOS, so it truncates and the close icon keeps its
space. Affects Android, Desktop and iOS.

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ComposeFileView.kt

@@ -33,8 +33,7 @@ fun ComposeFileView(fileName: String, cancelFile: () -> Unit, cancelEnabled: Boo
         .size(36.dp),
       tint = if (isInDarkTheme()) FileDark else FileLight
     )
-    Text(fileName)
-    Spacer(Modifier.weight(1f))
+    Text(fileName, maxLines = 1, modifier = Modifier.weight(1f))
     if (cancelEnabled) {
       IconButton(onClick = cancelFile, modifier = Modifier.padding(0.dp)) {
         Icon(