Adds localization improvements to the table filters.

[fsamapoor]

New translation keys have been added that need to be added to all locals later on. Feel free to change the translation keys.

• 1c86f49da3354a07f10c5eb67b4606b0ef0425d6 fixes the #41.
• df9b4e152e77c687e08f8a67498485722352a9fb updates the filter labels. It is meant to be "key or value", not just the value.
• c9f8ab91c2957bc696672045fdae0dd0258a7e2f adds a new translation key for the localization of hints.
• 2fe31ad724b475c4fda7ea58adaeda76e8d4f117 adds new translation keys for the localization of filter indicators.