* change the name of this feature to `Enable Block-Navigation`
* change the icon of the toggle button used to enable this feature
* use a new class `BlockNavigation` to hold all the data about this feature
* create `BlockNavigation` data only when it is enabled
Signed-off-by: leo <longshuang@msn.cn>
* Corrected misspelled local variable nextHigh(t)light
* Implemented change-block navigation
* Modified behavior of the Prev/Next Change buttons in DiffView toolbar.
* Well-defined change-blocks are pre-calculated and can be navigated between.
* Current change-block is highlighted in the Diff panel(s).
* Prev/next at start/end of range (re-)scrolls to first/last change-block
(I.e when unset, or already at first/last change-block, or at the only one.)
* Current change-block is unset in RefreshContent().
* Added safeguards for edge cases
* Added indicator of current/total change-blocks in DiffView toolbar
* Added new Icon and String (en-US) for Highlighted Diff Navigation
* Added Preference and ToggleButton for diff navigation style
* Renamed 1 of 2 SyncScrollOffset props, for clarity
The property "SyncScrollOffset" in TextDiff is distinct from the one with the same name in TwoSideTextDiff. These two properties are used in separate (though slightly related) ways and are not really connected.
The one in TwoSideTextDiff is mainly used to keep the scroll-pos of the two SingleSideTextDiffPresenter views in sync (aligned), while the one in TextDiff is used only to preserve/reset the scroll-pos in the single CombinedTextDiffPresenter view when (re)loading Diff Content (so not really syncing anything).
To clarify this and to make the two properties more distinguishable, I renamed the one in TextDiff to simply "ScrollOffset".
* Added icon and string for "Show All Lines"
New StreamGeometry "Icons.Lines.All" using SVG path from "text_line_spacing_regular" at https://avaloniaui.github.io/icons.html.
New String "Text.Diff.VisualLines.All" for en_US locale (no translations yet).
* Implemented new TextDiff feature "Show All Lines" (toggle)
* Added new ToggleButton in DiffView toolbar, visible when IsTextDiff, disabling the buttons "Increase/Decrease Number of Visible Lines" when on.
* Added new Preference property "UseFullTextDiff".
* Added StyledProperty "UseFullTextDiffProperty" in TextDiffView, with a DataTemplate binding to the corresponding preference property.
* When changed, UseFullTextDiffProperty is handled identically as UseSideBySideDiffProperty (via new helper method RefreshContent(), for unification with OnDataContextChanged()).
* Added new method DiffContext.ToggleFullTextDiff() for changing the preference property and reloading the diff content.
* Implemented the new feature by overriding the "unified" (number of context lines) for Commands.Diff() with a very high number.
NOTE: The number used (~1 billion) is supposed to be the highest one working on Mac, according to this forum comment: https://stackoverflow.com/questions/28727424/for-git-diff-is-there-a-uinfinity-option-to-show-the-whole-file#comment135202820_28846576
* remove dotnet-tool.json because the project does not rely on any dotnet tools.
* remove Directory.Build.props because the solution has only one project.
* move src/SourceGit to src. It's not needed to put all sources into a subfolder of src since there's only one project.
