Improved detection of conflicting indexes when doing DROP COLUMN on a column

whose name is quoted in the index definition.
Fix for ticket [1c24a659e6d7f3a1].

FossilOrigin-Name: c450d0ad6b39db4bf93015d629e25f7af0d7a9779f7a987e2fc38a5ef064a182

diff --cc manifest
index ea6ec02745e496235de9d895e98e986411ecb7bc,ba7cf6ad1a340b4ca834cceef4414da8d7eb85b5..e587f7465ab5b76fafc6e8f3b826c5d5d3c73534
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Update\sgenerated\sautoconf/Makefile.msc\sto\sreflect\sits\ssource.
- D 2021-03-12T23:15:08.537
 -C An\sadditional\stest\scase
 -D 2021-03-14T20:17:06.460
++C Improved\sdetection\sof\sconflicting\sindexes\swhen\sdoing\sDROP\sCOLUMN\son\sa\scolumn\nwhose\sname\sis\squoted\sin\sthe\sindex\sdefinition.\nFix\sfor\sticket\s[1c24a659e6d7f3a1].
++D 2021-03-15T14:58:12.255
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -1910,7 -1910,7 +1910,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P acd63062eb06748bfe9e4886639e4f2b54ea6a496a83f10716abbaba4115500b
- R 17f134cb27374fc63f087829be8f2d98
- U larrybr
- Z f38b52cd66603df216d7879edb7bd2e5
 -P a2adae907a28e169e64cfe69d97d7b68cb94e6ba07d2dfa995e3fbc6672fafdd
++P d9f8f488ff9d47fe7bb8838e683bae4fea038f7278ef885ecf292143a0dd88ed 7e2d7ca15a84e5bd9f2b1360232607d15c2dbcc9d30b0f1a7cdbf2865e6b1af5
+ R 7efc992597193ee315e52dfcbc967a14
++T +closed 7e2d7ca15a84e5bd9f2b1360232607d15c2dbcc9d30b0f1a7cdbf2865e6b1af5
+ U drh
 -Z 11c283259a83f4e587c2a4c2c63c3389
++Z 0db085b35c83a129196feb29998a65ef

diff --cc manifest.uuid
index 214626662fe1b8631856efa68ea920f70c1e939d,9d276acda2a671155596b9ccf353dfc186dcf521..7b3ac8c0b015ef4fbf05a0ee8a4b33a2f7c336de
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- d9f8f488ff9d47fe7bb8838e683bae4fea038f7278ef885ecf292143a0dd88ed
 -7e2d7ca15a84e5bd9f2b1360232607d15c2dbcc9d30b0f1a7cdbf2865e6b1af5
++c450d0ad6b39db4bf93015d629e25f7af0d7a9779f7a987e2fc38a5ef064a182