Add Ctrl-M to the tree drop down to open manage trees dialog (#6269)

* Add Ctrl-M to the tree drop down to open manage trees dialog

* Add to help.txt

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Co-authored-by: Hiney <pHiney@users.noreply.github.com>

help.txt

@@ -29,6 +29,7 @@ Ctrl + I	Jump to import tab
 Ctrl + A	Select all
 Ctrl + C	Copy
 Ctrl + F	Show find / search box (e.g. unique item / tree)
+Ctrl + M	Manage Trees (Tree tab only)
 Ctrl + N	New build (in build selection menu)
 Ctrl + S	Save build to file
 Ctrl + U	Check for update

src/Classes/TreeTab.lua

@@ -203,6 +203,8 @@ function TreeTabClass:Draw(viewPort, inputEvents)
 				inputEvents[id] = nil
 			elseif event.key == "f" and IsKeyDown("CTRL") then
 				self:SelectControl(self.controls.treeSearch)
+			elseif event.key == "m" and IsKeyDown("CTRL") then
+				self:OpenSpecManagePopup()
 			end
 		end
 	end
@@ -249,7 +251,7 @@ function TreeTabClass:Draw(viewPort, inputEvents)
 		t_insert(newSpecList, (spec.treeVersion ~= latestTreeVersion and ("["..treeVersions[spec.treeVersion].display.."] ") or "")..(spec.title or "Default"))
 	end
 	self.build.itemsTab.controls.specSelect:SetList(copyTable(newSpecList)) -- Update the passive tree dropdown control in itemsTab
-	t_insert(newSpecList, "Manage trees...")
+	t_insert(newSpecList, "Manage trees... (ctrl-m)")
 	self.controls.specSelect:SetList(newSpecList)
 
 	if not self.controls.treeSearch.hasFocus then