nb-NO: Filled in missing strings + small fixes

[Mmmmulder]

Noticed several strings were left empty, so filled them in.
Removed # descriptive lines and empty spaces that weren't present in the current en-GB.
Translated some words that were missed.
Fixed some awkward wording and typos.

[github-actions]

Check results

For details go to Translation Check -> Details. Expand Run checks build stage and use the build-in search to find your language (e.g. pl-PL)

	Missing The translation is not added to translation file. (e.g. STR_9999 is in en-GB but is not available in given language)	Not needed The translation file contains entries that are not in en-GB and should be removed (e.g. STR_9999 exists in given language but is not in en-GB)	Same The translation and source string is exactly the same. (e.g. STR_9999 is Umbrella in both en-GB and given language). This may be desired in some cases (e.g. April is the same in English and German)
nb-NO	0	0	483 (-2)

Other translations

	Missing The translation is not added to translation file. (e.g. STR_9999 is in en-GB but is not available in given language)	Not needed The translation file contains entries that are not in en-GB and should be removed (e.g. STR_9999 exists in given language but is not in en-GB)	Same The translation and source string is exactly the same. (e.g. STR_9999 is Umbrella in both en-GB and given language). This may be desired in some cases (e.g. April is the same in English and German)
ar-EG	92	2	1924
ca-ES	21	1	117
cs-CZ	401	0	246
da-DK	0	0	534
de-DE	1	1	352
en-US	3365	0	390
eo-ZZ	0	1	89
es-ES	17	1	304
fi-FI	174	1	109
fr-CA	3948	0	0
fr-FR	1	1	160
hu-HU	0	0	120
it-IT	3	1	342
ja-JP	317	1	607
ko-KR	0	1	194
nl-NL	0	13	451
pl-PL	159	1	380
pt-BR	0	1	146
ru-RU	1323	0	111
sv-SE	74	1	347
tr-TR	380	1	395
vi-VN	239	3	3227
zh-CN	21	1	82
zh-TW	134	0	331