UI Improvements:
    - Moved beat selector/slider into context menu (suggested by studyingegret)
    - Number Inputs moved from dialogs to popups (also suggested by studyingegret)
    - Sections' labels in section menu are now more consistent

Bugfixes:
    - Layouts mixed up on androids < 13 (Thanks to studyingegret for the bug report)
    - Integer inputs weren't filtering letters and large/small numbers out.
    - Hold-to-clear beat on remove/unset buttons in effect controls weren't doing anything  
    - Column widths weren't being adjusted when a lines were removed
