Streamline the process of checking waiting/fuzzy strings

[SergeyBiryukov]

​https://translate.wordpress.org/locale/ru/default/waiting shows the number of waiting strings.

However, approving those strings is not a very straightforward process:

1. Click 'Translate Project'.
2. Select a sub-project.
3. Click 'Waiting'.
4. If there are no strings, click 'Fuzzy'.
5. Finally approve or reject/correct the strings.
6. Repeat 1200 times (20 projects * ~60 pages).

It would help if there was a single view per project (or maybe a global one as well?) with all the waiting and fuzzy strings (including sub-projects), and the Waiting/Fuzzy count would link to that view.

[netweb]

For en_AU we have a PTE who has been translating all the "e-commerce" type plugins, in the wast couple of weeks this has caused our waiting strings to approx double/triple from ~10-15k to now 30k waiting strings due to those strings being "populated" across to other projects.

I have no intention of going through the process of approving each of those ~30,000 strings one by one with the current workflow the way it stands right now.

[SergeyBiryukov]

Related: #2523

[SergeyBiryukov]

WordPress.com has a handy all-waiting view, which looks exactly as what I'd like to see here:
​https://translate.wordpress.com/languages/ru/default/-all-waiting