Introduce 'Endianness' in UI and honor it during group rendering

[martin-fleck-at]

What it does

• Move Endianness interface into common code
• Add setting for 'Endianness' in package.json
• Add option for 'Endianness' in options panel
• Assume DAP as big endian and revert byte-order for little endian
• Set 'Little Endian' as default as it may be more common

Closes #88

How to test

• Open a Memory Inspector
• Test the default preference in the Settings
• Test the individual settings in the memory inspector options
• See how the byte order changes within a group, not only a word

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

[martin-fleck-at]

@colin-grant-work Thank you for having a look at this so quickly! I just rebased the branch to resolve the merge conflict (no other changes).

[colin-grant-work]

@martin-fleck-at, looks like we've managed to create new conflicts in the meantime, sorry!

[martin-fleck-at]

@colin-grant-work I small price to pay for all that progress we are making! ;-) I rebased the change on the latest master.

[martin-fleck-at]

Just another rebase :-)

[jreineckearm]

@thegecko , @colin-grant-work , @planger , could one of you please merge before we catch another merge conflict. :-)

[jreineckearm]

Hang on, something's broken with the autofit now, @martin-fleck-at :
It looks like it truncates now cells in the Data column.

Truncated

Widened Data column, still truncated but a little less since more space

[haydar-metin]

@jreineckearm @martin-fleck-at I will have a look at it. My approach to smooth the rendering creates more problems, and it is not worth those headaches.

See #99

[martin-fleck-at]

@jreineckearm Do you agree that this PR can then be merged since the issue will be fixed as part of #99?

[jreineckearm]

@martin-fleck-at , yes I agree ;-)