Fixed issues that occur if WebAdmin not installed

[subnut]

• Show the version as N/A (Not Available) instead of v-1
• Don't show out-of-date message in status message

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What does this PR aim to accomplish?:
Fix the errors mentioned in the Commit Message. The errors occur only when Web Interface not installed.

How does this PR accomplish the above?:
Checks if web interface installed. If not, sets version to 'N/A' instead of v-1

What documentation changes (if any) are needed to support this PR?:
None

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[subnut]

Ping @DL6ER @dschaper

[subnut]

Rebased on master

[subnut]

Fixed Stickler errors

[yubiuser]

We already source setupVars.conf twice, I think we don't need it a third time:

PADD/padd.sh

Line 1249 in 8558356

. /etc/pihole/setupVars.conf

PADD/padd.sh

Line 1192 in 8558356

. /etc/pihole/setupVars.conf

(One can probably be removed).

[subnut]

We wouldn't have needed to source that file if it was guaranteed that the file has been sourced already (ie. source it in the main script, not inside any function or if block).

Should I go ahead and do that? (i.e. add . /etc/pihole/setupVars.conf to line 28, and remove from everywhere else)

[yubiuser]

Should I go ahead and do that? (i.e. add . /etc/pihole/setupVars.conf to line 28, and remove from everywhere else)

I think this is a good idea.

[subnut]

@yubiuser Done!