finance/rex: update to 0.1.15

Updates
    Fix negative balance getting stuck at 0.00
    Fix the search page not giving correct results when tx type is transfer and both from and to method fields are not filled up
    Fix a bug that caused unrelated transactions to show up on the home page
    On the Home page transactions with the same date can now be moved up with ',' and down with '.'
    A new option on J press to add backup locations. On q press, the latest DB will be copied there
    Added previously missing option to reset new app data location when the input is blank
    New and modified status updates for better clarity
    New offset-based scrolling when scrolling tables
    A new Activity page on 'y' press that will show activity details such as when transactions were added, deleted, edited, etc
    Popup help texts have been updated
    Dependency updates and minor performance improvements

Changes
    Fix negative balance not loading by @TheRustyPickle in #57
    Allow switching position of a tx by @TheRustyPickle in #60
    Show a new info status when switching to normal tx mode by @TheRustyPickle in #65
    Backup path by @TheRustyPickle in #66
    Update dependencies by @TheRustyPickle in #67
    Add a history page by @TheRustyPickle in #68
    Fix id swap UI bug by @TheRustyPickle in #72
    Update popup text by @TheRustyPickle in #74

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