[Bugs] #3026 UNSP: Time filter only cuts off the end of the list instead of offering disjunct time spans

[Sugar Labs Bugs]

#3026: Time filter only cuts off the end of the list instead of offering disjunct
time spans
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    Reporter:  sascha_silbe               |          Owner:                             
        Type:  enhancement                |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  journal                    |        Version:  Unspecified                
    Severity:  Minor                      |       Keywords:                             
Distribution:                             |   Status_field:  New                        
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 The time filter in the Journal only changes the number of entries shown;
 it doesn't select different sets. With the default setting of showing
 everything, the data store will already need to scan the entire index, so
 the performance advantage of changing the setting manually is usually
 negligible.

 While the current time filter options may be useful in combination with
 sort orders other than the default time based one, it makes sense to
 additionally offer time spans (start and end time limited) and / or
 starting times (open ended) for the time filter.

 We should also provide a way to search for arbitrary time spans by using
 Xapian value ranges in the text search field, similar to how we already
 support searching for certain other metadata. But let’s open another
 ticket for that.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3026>
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