Make spelling of "All-Link" consistent in Insteon integration (#139651)

"All-Link" is a fixed term in the Insteon integration that should be kept in translations. To clarify that this commit makes all occurrences in the Insteon integration consistent (plus fixing one typo).

On the other end the word "database" is sentence-cased as this can be translated, just as "record" etc.

Finally the description of the "Load All-Link database" action is made consistent using descriptive third-person singular as all other actions do.