Take core 7.5.2, and edit rows, columns and CSV files

[andiwand]

Core 7.5 adds structural edits of a sheet, editing of a CSV file, a recalculation on save, and the language of a document. 7.5.1 and 7.5.2 are bug fixes on top of it, with no change to the API.

Changes

• Rows and columns. The sheet tools get a "Rows and columns" tool. It opens six actions: insert rows above or below, insert columns left or right, and delete rows or columns. Each action calls odr.editing.insertRows and the related functions on the selection. Lite offers Pro for the tool. The icons are Material Symbols.
• CSV editing. The core now gives CSV edit and save. CoreLoader.documentOf() gets the document from CsvFile too, so a CSV opens as an editable sheet and saves as a CSV.
• Language of read aloud. LoadedDocument keeps Document.locale(). TtsActionModeCallback uses that language if a voice for it is installed.
• Cut sheets. The page refuses to edit a cut sheet with sheetCut, and the app shows a message for it.
• Stale cells. A save now recalculates, and the app reloads the file after a save. So the message says "Saving computes them again where it can".

The changed strings (pro_offer_sheet, edit_cells_stale) lose their old translations, and scripts/translate-app.py writes them again before the release.

Printing from the core also improves (one page on each sheet, and light colors for a dark document). The app keeps its pause of WebView darkening, because images still darken in the WebView. It also keeps its paper preselection, because the print dialog does not read @page.

Tests

• New: CoreTest.testCsvEdit, MainActivityTests.aSheetRowIsInsertedFromTheStrip (Pro and Lite), and the locale in DocumentParcelTest.
• On 7.5.1: assembleDebug, testProDebugUnitTest, lintProDebug, lintLiteDebug, spotlessCheck, and all 109 connectedProDebugAndroidTest tests pass. The 21 MainActivityTests in Lite also pass.
• 7.5.2 is not on Maven Central yet. CI runs again when it is.