You can change it just for the customer by using a custom stylesheet with skin extension.
LiveValidation used to turn the borders red on the bad fields using CSS but I removed it
because it was unfriendly with the Toucan skin.
See revision:
  Hi devs,
 We have a customer request for highlighting the filters that are currently
 applied on a livetable. The rationale of this, is that sometimes the
 filtered table is empty or unexpected by the user, but he does not notice
 that a filter is currently applied. We have written a proposed
 implementation as well and you may also see what it looks like in the
 attached screenshot, for both text field and select box (for webkit).
 Currently, I choose yto use the "background highlight color" of the active
 color theme, but my feeling is that adding another highlight color would be
 better.
 I have also hook to events separately from the "main" refresh handler,
 because I do not understand the implementation of this handler. Why using an
 intermediate makeRefreshHandler, and why it does not properly provide the
 currently changed filter to the handler ? Could or should I change that ?
 WDYT ?
 Denis
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