Clarify quotation include/exclude when composing

Could we clarify the user interface to make the options of quotations more obvious? To me it looked like a minimize function, instead of an exclude function.

Suggesting tree modifications:

1. Change the text "quoted message" to "re-attach quoted message" to clarify that the button has the action of re-attaching. (Or change it to "re-attatch quotation" or "attach quotation". Anyway you get the point.) (Dont forget to inform the translaters about this)
2. Change the "X" symbol (cross) to a trashbin symbol, to symbolise discarding the quotation. It won't be confusing to have a trashbin there as it is located next to the edit button and the qoutation is outlined.
3. Add a third button, to recover the original quotation. I came up with this to solve an issue I sometimes have where I start editing the quotation and composing a message and later realise I deleted too much in the quotation. A reset button for the quotation area (with a confirm dialog) would resolve that. Just give it some sort of refresh icon. (One might call this an "undo edit" option).

Pretty high standards huh? But why shouldn't we ;)

No files or tests are named. Start by locating the quotation controls in the compose message UI and their translation strings; compare the current re-attach, discard, and reset behavior with the three suggestions. Done means the quotation actions are visually distinct, the original quotation can be restored, and translators are informed.