ok stsp@

Add () and {} key maps to navigate to the previous and next file or hunk in the diff. This required changing Got's diff API to collect line type metadata in addition to the line offsets already produced as prompted by stsp. ok stsp@

Available to all views; for example, 99g will navigate to line 99 in the file if in a blame view or the 99th commit if in a log view. Includes improvements suggested by naddy and stsp. ok naddy@

Deduplicate view initialisation boilerplate and simplify new key map view requests with dispatch routine. Includes improvements suggested by stsp. ok stsp@

ok stsp@

Don't move the selection cursor due to a bogus offset after closing child views following use of 'B', C-l, and backspace log view key maps. ok stsp@

Replace view->mode == TOG_VIEW_LOG checks for requesting commits to populate the log view with calls to view->resize(). ok stsp@

When switching a child log view from a h- to a v-split, new log lines are empty. Rather than (mis)trace height and (not) call request_log_commits(), let resize_log_view() do the math and request commits if needed to draw new lines. ok op@

Found by llvm's scan-build (dead store). OK stsp

As per stsp's TODO item: open a log view of the selected line with 'L'. helped by and ok stsp@

Use J and K to move to the next and previous commits, respectively, when the diff is loaded from the log or blame views. Patch by Mikhail ok stsp@

improvements and ok by jamsek and stsp

Includes style improvements prompted by stsp. Previously, we would only call request_log_commits() when terminal height is increased in a splitscreen view. This fixes the case when a log view with no children is resized that can lead to empty lines: $ tog # 80x24 23j # move down to the last commit *increase terminal height to ~30 lines then reduce back to 80x24* ~5j # move down to the _last_ commit *increase terminal height to ~33 lines* *new lines are empty* ok stsp@