Rule/Script edit: Fix not editable not properly handled & Always show tags

[florian-h05]

Fixes an issue where the configuration of a script action of a file-based rule (e.g. those created using JSRule or Rule Builder of openhab-js) was shown as editable, even though the rule is not editable because it is provisioned from file.

Always show the tag input, even if there are no rule tags. This is more consistent and avoids confusion, as you can now clearly see that a rule has no tags.

[relativeci]

Job #1377: Bundle Size — 15.84MiB (+0.09%).

8ac3ad4(current) vs 4864f43 main#1376(baseline)

Warning

Bundle contains 16 duplicate packages – View duplicate packages

Bundle metrics   3 changes 1 regression

	Current Job #1377	Baseline Job #1376
Initial JS	1.9MiB(+0.69%)	1.89MiB
Initial CSS	609.81KiB	609.81KiB
Cache Invalidation	93.87%	93.98%
Chunks	217	217
Assets	683	683
Modules	3036(+0.8%)	3012
Duplicate Modules	170	170
Duplicate Code	1.6%	1.6%
Packages	152	152
Duplicate Packages	16	16

Bundle size by type   2 changes 2 regressions

	Current Job #1377	Baseline Job #1376
JS	9.31MiB (+0.12%)	9.3MiB
Other	4.75MiB (+0.06%)	4.75MiB
CSS	861.35KiB	861.35KiB
Fonts	526.1KiB	526.1KiB
Media	295.6KiB	295.6KiB
IMG	140.74KiB	140.74KiB
HTML	1.23KiB	1.23KiB

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[stefan-hoehn]

Just to explain a bit more what the issue was:

Created a rule with JSRule, which is then still displayed as a file-based rule in the UI.

When opening that rule, only the code of the rule is displayed, but things like as UID, Label, Description, Tags, Script Language can still be edited

For file based rules all this should not editable, but the UI has allowed editing of all fields except the UID.
Also, the tag input was completely hidden if there were no tags instead of just being empty.

Even though it was editable, saving it did not have a effect (as it should be).
In a nutshell, like any other file based rule, the information should be shown but not be editable via the UI, which was fixed here.

[stefan-hoehn]

The changes are straight forward and easy to understand.
LGTM. Thanks @florian-h05 you fixed this.