get rid of pane transition animations

It seems hard and is also liable to put pressure on the settings menu.

0021-draw_menu

@@ -25,7 +25,6 @@ draw_menu = function()
 			onpress1 = function()
 				Current_pane_index = Current_pane_index-1
 				Current_pane = Panes[Current_pane_index]
-				animate(slide_canvas(Current_pane_index+1, 'right'))
 			end,
 		})
 	end
@@ -40,7 +39,6 @@ draw_menu = function()
 				table.insert(Panes, new_pane())
 				Current_pane_index = Current_pane_index+1
 				Current_pane = Panes[Current_pane_index]
-				animate(slide_canvas(Current_pane_index-1, 'left'))
 			end,
 		})
 	else
@@ -52,7 +50,6 @@ draw_menu = function()
 			onpress1 = function()
 				Current_pane_index = Current_pane_index+1
 				Current_pane = Panes[Current_pane_index]
-				animate(slide_canvas(Current_pane_index-1, 'left'))
 			end,
 		})
 	end

0042-draw_canvas

@@ -1,7 +1,6 @@
 draw_canvas = function()
 	if Current_pane.canvas == nil then return end
-	love.graphics.setBlendMode('replace')
---	love.graphics.setBlendMode('alpha', 'premultiplied')
+	love.graphics.setBlendMode('alpha', 'premultiplied')
 	love.graphics.setColor(1,1,1,1)
 	love.graphics.draw(Current_pane.canvas, 0,0)
 	love.graphics.setBlendMode('alpha')

0051-run_button

@@ -11,10 +11,7 @@ run_button = function()
 			Current_pane.canvas = love.graphics.newCanvas()
 			love.graphics.setCanvas(Current_pane.canvas)
 			love.graphics.push('all')
-			love.graphics.setBlendMode('replace')
 			love.graphics.setBackgroundColor(1,1,1)
-			love.graphics.setColor(1,1,1)
-			love.graphics.rectangle('fill', 0,0, App.screen.width, App.screen.height)
 			love.graphics.setColor(0,0,0)
 			Current_pane.output_editor_state.lines = {}
 			Text.redraw_all(Current_pane.output_editor_state)

0059-slide_canvas

@@ -1,17 +0,0 @@
-slide_canvas = function(pane_index, dir)
-	local speed = App.screen.width/0.5/60  -- px/frame
-	return function()
-		end_frame()
-		if dir == 'right' then
-			for x=0,App.screen.width,speed do
-				draw_previous_canvas(Panes[pane_index].canvas, x)
-				end_frame()
-			end
-		elseif dir == 'left' then
-			for x=0,-App.screen.width,-speed do
-				draw_previous_canvas(Panes[pane_index].canvas, x)
-				end_frame()
-			end
-		end
-	end
-end

0060-draw_previous_canvas

@@ -1,7 +0,0 @@
-draw_previous_canvas = function(canvas, x)
-	if canvas == nil then return end
-	love.graphics.setBlendMode('replace', 'premultiplied')
-	love.graphics.setColor(1,1,1,1)
-	love.graphics.draw(canvas, x,0)
-	love.graphics.setBlendMode('alpha')
-end