The left side tags list is sorted incorrectly (compared to Mercurial tags command).

Consider the following tags list. Sorted as per Mercurial (2.1):
1.1
1.2
1.9
1.10

SourceTree sorts the list in alpha-comparison order, making it difficult to find the most significant tag:
1.1
1.10
1.2
1.9

SourceTree should be sorting this list in numeric-comparison order, as Mercurial does.

The second part of this issue is that, when the tag list becomes significantly long (eg: 100+ tags), it will become practically impossible to use the tag list.

Providing options to:

• select the sort order (ascending/descending), and
• limit the list (most recent N tags)
  will make this significantly more usable.