Incorrectly named labels used in System Settings [5.2.1-B1]

In

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task we've added a page to ease up new setting adding. We've also introduced some basic format validations there, for example:

system setting label must start with "la_config_"
system setting heading label must start with "la_section_"

However it seems, that most part of existing system settings doesn't obey these rules, which results in inability to add/edit system setting configuration (not values). Here are statistics:

Heading Label	Setting Count
no label	11
la_config_DefaultIncreaseImportance	5
la_config_DefaultPop	5
la_config_DefaultRating	5
la_config_SearchRel_DefaultKeyword	5
la_config_ShowMultiple	4
la_posts_subheading	1
la_Text_Affiliates	3
la_Text_Articles	17
la_Text_ContactsGeneral	7
la_Text_Coupons	1
la_Text_Currencies	1
la_Text_Date_Time_Settings	2
la_Text_Links	21
la_Text_Manufacturers	2
la_Text_MetaInfo	2
la_Text_Orders	11
la_Text_Polls	2
Total	105

This is 105 incorrect of 386 total, which is 27% of all system settings have incorrect labels.

Looking at Prompt field, that contains a label for system setting name itself numbers are higher: 238 out of 386 doesn't start with "la_config_", which is 61%.

I think we need to take care of that as sooner as possible, because adding this extra validation for system settings, while not fixing existing system settings we've shot self in a leg