Warn the user if the implicit description filter was used for a non-report command

## What command(s) did you run?
`$ task project:Kitchen\ floor\ renewal list`
`$ task project:'Kitchen floor renewal' list`
`$ task project:"Kitchen floor renewal" list`

## What did you expect to happen?
Tasks under the project "Kitchen floor renewal" to be listed.

## What actually happened?
All commands return `No matches.`.

The same occurs for all other projects containing spaces. The capitilisation and location of the spaces in the project is exactly as typed above.

```
task 2.5.3
Platform: Linux

Compiler
Version: 10.2.0
Caps: +stdc +stdc_hosted +LP64 +c8 +i32 +l64 +vp64 +time_t64
Compliance: C++17

Build Features
Built: Feb 2 2021 23:45:39
CMake: 3.19.4
libuuid: libuuid + uuid_unparse_lower
libgnutls: 3.7.0
Build type:

Configuration
File: /home/f/.taskrc (found), 1733 bytes, mode 100644
Data: /home/f/.task (found), dir, mode 40755
Locking: Enabled
GC: Enabled
$EDITOR: vim
Server:
CA: -
Certificate: -
Key: -
Trust: strict
Ciphers: NORMAL
Creds:

Hooks
System: Enabled
Location: /home/f/.task/hooks
Active: on-modify.timewarrior (executable)
Inactive:

Tests
Terminal: 120x30
Dups: Scanned 47 tasks for duplicate UUIDs:
No duplicates found
Broken ref: Scanned 47 tasks for broken references:
No broken references found
```