webapp: Improve UI around remote that have no annex.uuid set, either because setup of them is incomplete, or because the remote git repository is not a git-annex repository.

Complicated by such repositories potentially being repos that should have
an annex.uuid, but it failed to be gotten, perhaps due to the past ssh repo
setup bugs. This is handled now by an Upgrade Repository button.

Remote.hs

@@ -24,6 +24,7 @@ module Remote (
 	remoteMap,
 	uuidDescriptions,
 	byName,
+	byNameOnly,
 	byNameWithUUID,
 	byCost,
 	prettyPrintUUIDs,
@@ -58,7 +59,7 @@ import Logs.Trust
 import Logs.Location hiding (logStatus)
 import Remote.List
 import Config
-import Git.Remote
+import Git.Types (RemoteName)
 
 {- Map from UUIDs of Remotes to a calculated value. -}
 remoteMap :: (Remote -> a) -> Annex (M.Map UUID a)
@@ -104,6 +105,12 @@ byName' n = handle . filter matching <$> remoteList
 	handle (match:_) = Right match
 	matching r = n == name r || toUUID n == uuid r
 
+{- Only matches remote name, not UUID -}
+byNameOnly :: RemoteName -> Annex (Maybe Remote)
+byNameOnly n = headMaybe . filter matching <$> remoteList
+  where
+	matching r = n == name r
+
 {- Looks up a remote by name (or by UUID, or even by description),
  - and returns its UUID. Finds even remotes that are not configured in
  - .git/config. -}