[IMP] l10n_uk: few improvements in UK localization,

    - suppress old tax 17.5%
    - updated 'Standard rated purchases from EC' from 17.5% to 20% to show correct value in enterprise report under [BOX 2] line
    - Added missing tax, 'Lower rate sales (5%)', and also added a saperate tag for it
    - improved tax name

was Task: 33297
was PR #22173

addons/l10n_uk/data/account.account.tag.csv

@@ -9,6 +9,7 @@ tag_pt8m,PT8M,taxes
 tag_pt8r,PT8R,taxes
 tag_pt8,PT8,taxes
 tag_pt5,PT5,taxes
+tag_st5,ST5,taxes
 tag_st4,ST4,taxes
 tag_pt7,PT7,taxes
 tag_st11,ST11,taxes

addons/l10n_uk/data/account.tax.template.csv

 id,description,chart_template_id:id,type_tax_use,name,amount_type,amount,account_id:id,refund_account_id:id,children_tax_ids:id,tag_ids:id,tax_group_id:id
 ST0,ST0,l10n_uk,sale,Zero rated sales,percent,0,2200,2200,,tag_st0,tax_group_0
-ST1,ST1,l10n_uk,sale,Standard rate sales (17.5%),percent,17.5,2200,2200,,tag_st1,tax_group_175
 ST2,ST2,l10n_uk,sale,Exempt sales,percent,0,2200,2200,,tag_st2,tax_group_0
 PT0,PT0,l10n_uk,purchase,Zero rated purchases,percent,0,2201,2201,,tag_pt0,tax_group_0
-PT1,PT1,l10n_uk,purchase,Standard rate purchases (17.5%),percent,17.5,2201,2201,,tag_pt1,tax_group_175
 PT2,PT2,l10n_uk,purchase,Exempt purchases,percent,0,2201,2201,,tag_pt2,tax_group_0
-PT8M,PT8M,l10n_uk,none,Standard rated purchases from EC,percent,17.5,2201,2201,,tag_pt8m,tax_group_0
-PT8R,PT8R,l10n_uk,none,Reverse EC Purchase VAT,percent,-17.5,2201,2201,,tag_pt8r,tax_group_0
+PT8M,PT8M,l10n_uk,none,Standard rated purchases from EC,percent,20.0,2201,2201,,tag_pt8m,tax_group_0
+PT8R,PT8R,l10n_uk,none,Reverse EC Purchase VAT,percent,-20.0,2201,2201,,tag_pt8r,tax_group_0
 PT8,PT8,l10n_uk,purchase,Standard rated purchases from EC,group,,2201,2201,"PT8M,PT8R",tag_pt8,tax_group_0
 PT5,PT5,l10n_uk,purchase,Lower rate purchases (5%),percent,5,2201,2201,,tag_pt5,tax_group_5
+ST5,ST5,l10n_uk,sale,Lower rate sales (5%),percent,5,2200,2200,,tag_st5,tax_group_5
 ST4,ST4,l10n_uk,sale,Sales to customers in EC,percent,0,2200,2200,,tag_st4,tax_group_0
 PT7,PT7,l10n_uk,purchase,Zero rated purchases from EC,percent,0,2201,2201,,tag_pt7,tax_group_0
-ST11,ST11,l10n_uk,sale,Standard rate sales (20%),percent,20,2200,2200,,tag_st11,tax_group_20
-PT11,PT11,l10n_uk,purchase,Standard rate purchases (20%),percent,20,2201,2201,,tag_pt11,tax_group_20
+ST11,ST11,l10n_uk,sale,Standard rate (20%),percent,20,2200,2200,,tag_st11,tax_group_20
+PT11,PT11,l10n_uk,purchase,Standard rate (20%),percent,20,2201,2201,,tag_pt11,tax_group_20