This commit allows for using Tab and Shift+Tab to indent
and de-indent selected text in the composer. The selected
text is searched for the most occurrences of either tabs (\t)
or spaces at the start of each line, and that character is
used for indentation of all lines.
* FIX: paste the spreadsheet to the composer
If we paste spreadsheet with the missing label we receive
`" this \n1 2"`
If we trim whitespace at the beginning then our later calculation to determine if it is a table is incorrect:
```
const columns = rows.map((r) => r.split("\t").length);
const isTable =
columns.reduce((a, b) => a && columns[0] === b && b > 1)
```
https://meta.discourse.org/t/pasting-from-spreadsheet-wont-work-if-corner-cell-is-empty/169443
In newer Embers jQuery is removed. There is a `find` but it only returns
one element and not a jQuery selector. This patch migrates our code to a
new helper `queryAll` which allows us to remove the global.
We used many global functions to handle tests when they should be
imported like other libraries in our application. This also gets us
closer to the way Ember CLI prefers our tests to be laid out.
This is where they should be as far as ember is concerned. Note this is
a huge commit and we should be really careful everything continues to
work properly.
