Enhancement/suggestion #616 was closed after implementing a version which is different from my suggested implementation in PR #703. This was done with a reasoning that change navigation within the currently visible "page" is unnecessary (which is where I beg to differ).

The currently implemented feature (on develop branch, not yet released) is basically an enhanced Page Up/Down, which jumps to the previous/next "page" that contains a change not already shown on the current "page". No highlighting is made, since there is no notion of a "current" change.

In contrast, my PR adds the following features which are more similar to how P4Merge, WinMerge and other external Diff/Merge tools do their change navigation:

• Jump (scroll) to prev/next change-block (defined as a consecutive block of added/removed lines).
• Highlight the "current change-block".
• Show numbers for "current change-block" and "total number of change-blocks" in the Diff toolbar. (Example: 3/15)
• For each new Diff, the "current change-block" is initially unset (Example: -/15) and no highlighting is done until a prev/next arrow is clicked.
• Prev/next arrows are not disabled when at first/last change-block, instead clicking the arrow in these cases will scroll the first/last change-block into view again.

I would like this alternative implementation (from the PR) to be included as an optional feature, selectable by an option in Preferences. The current implementation could still be the default for this option. (See ongoing discussion in the PR.)

NOTE: Keyboard shortcuts could be added as a future enhancement.