Cannot select saved questions from collections that have colon in their name in the query builder

[mlazowik]

Describe the bug
The table picker says "No tables found in this database." for every collection that has a colon in its name. The reason is that the frontend sends malformed API requests (cuts the collection name right before the colon), and so it gets a 404 from the API.

Logs
Server:

[7876f9e5-776b-4a94-ba6b-469dc229e21e] 2021-01-06T20:53:31+01:00 WARN metabase.middleware.log GET /api/database/-1337/schema/ScanForm 404 1.1 ms (1 DB calls) 
"Not found."

Frontend:

[Error] Request entities,schemas,-1337:ScanForm: TK,fetch failed: – {status: 404, data: "Not found.", isCancelled: false}
	(anonymous function) (app-main.bundle.js:5:62011)
	l (vendor.bundle.js:98:125993)
	(anonymous function) (vendor.bundle.js:98:125778)
	r (app-main.bundle.js:5:57724)
	(anonymous function) (app-main.bundle.js:5:57844)
	promiseReactionJob

Note that the frontend thinks it's requesting schemas from ScanForm: TK, but the server log shows ScanForm only.

To Reproduce
Steps to reproduce the behavior:

1. Create a collection with : in its name
2. Create a question, save it in that collection
3. Open query builder, select "Saved Questions" in the picker, then the collection you've created in step 1.

Expected behavior
Saved questions show up, just like for collections that don't have : in their name.

Screenshots

Information about your Metabase Installation:

• Your browser and the version: Safari Technology Preview Release 117 (Safari 14.1, WebKit 15611.1.7.2), Chrome 87.0.4280.88 (Official Build) (x86_64)
• Your operating system: macOS 10.15.7 (19H114)
• Your databases: PostgreSQL, sqlite3
• Metabase version: v0.37.4
• Metabase hosting environment: Docker
• Metabase internal database: H2

Severity
Low-ish

Additional context
Manually making a request to /api/database/-1337/schema/ScanForm:%20TK instead of /api/database/-1337/schema/ScanForm succeeds.

[mlazowik]

metabase/frontend/src/metabase/schema.js

Line 100 in 2a0683b

export const parseSchemaId = id => String(id || "").split(":");

metabase/frontend/src/metabase/entities/schemas.js

Line 31 in 2a0683b

throw new Error("Schemas ID is of the form dbId:schemaName");